Study of ZnO based heterostructures towards realizing high-luminous efficiency ultraviolet to blue light-emitting diodes

2007 Fiscal Year Final Research Report Summary

• Project/Area Number: 18350092
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Functional materials/Devices
• Research Institution: Tohoku University
• Principal Investigator: OHTOMO Akira Tohoku University, TOHOKU UNIVERSITY, INSTITUTE FOR MATERIALS RESEARCH, ASSISTANT PROFESSOR (10344722)
• Project Period (FY): 2006 – 2007
• Keywords: MATERIALS SCIENCE & CRYSTAL TECHNOLOGY / ELECTRONIC ELEMENTS & DEVICES / SEMICONDUCTOR OPTICS & PHYSICS / LIGHT-EMITTING DEVICES

Research Abstract

Zinc oxide (ZnO) has been attracting increasing attentions due to their superior properties for making ultraviolet to blue light-emitting diodes (LED) since the first homoepitaxial LED was realized in 2005. Impacts of their performance are expected to span from high-luminous efficiency to low-cost and clean productivity, taking advantages of abundant source and commercially available single-crystalline substrates. This study aims at improvement of electro-luminescence (EL) efficiency of LED fabricated on conducing ZnO substrates, where vertical contact geometry can be utilized being preferable to practical application. Using molecular beam epitaxy technique, we have fabricated double-heterostructures consisting of ZnO well layers sandwiched by p-and n-type MgZnO barrier layers. As a result, highly efficient band-edge EL is realized. Thus, our study paves a way for development of commercial products. It is also an important protocol to search a transparent and metallic material to form good Ohmic contact to p-type layer. We find that a conducting polymer having a large work function has good properties as well as applicability for the use of simple spin-coating. Moreover, this polymer is found to be very useful for making Schottky contact to n-type ZnO. Nevertheless, a few technical issues such as proper analysis of hole concentration and improvement of doping efficiency of nitrogen remain to be solved in future. In other viewpoints associated with the present study, some notable achievements can be obtained; (1) observation of quantum Hall effect in MgZnO/ZnO heterostructures (published in Science, one of high-impact journals) (2) epitaxial growth of MgZnO films having record-long photoluminescence lifetime, both of which indicate state of art technology. Over all achievements can be considered remarkable and satisfactory to contents of proposal. Furthermore, basic idea, knowledge and techniques for pursuing next research subject (study of transport properties in oxide semiconductor low-dimensional structures) have been acquired through this study.

Research Products

• [Journal Article] High electron mobility exceeding 10^4cm^2V^<-1>s^<-1> in Mg_xZn_<1-x>O/ZnO single heterostructures grown by molecular-beam epitaxy (2008)
  • Author(s): A. Tsukazaki, H. Yuji, S. Akasaka, K. Tamura, K. Nakahara, T. Tanabe, H. Takasu, A. Ohtomo, M. Kawasaki
  • Journal Title: Applied Physics Express (印刷中)
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] Photoinduced insulator-to-metal tiansition in ZnO/Mg_<0.15>Zn_<0.85>O heterostructures (2008)
  • Author(s): A. Tsukazaki, A. Ohtomo, M. Nakano, M. Kawasaki
  • Journal Title: Applied Physics Letters 92 Pages: 0521051-3
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] ZnOヘテロ接合の表面・界面制御と量子伝導 (2008)
  • Author(s): 大友 明, 塚崎 敦, 川崎雅司
  • Journal Title: 表面科学 29(1) Pages: 10-17
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] High electron mobility exceeding 10^4 cm^2V^<-1>s^<-1> in Mg_xZn_<1-x>O/ZnO single heterostructures grown by molecular-beam epitaxy (2008)
  • Author(s): A. Tsukazaki, H. Yuji, S. Akasaka, K. Tamura, K. Nakahara, T. Tanabe, H. Takasu, A. Ohtomo, M. Kawasaki
  • Journal Title: Applied Physics Express (in press)
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Photoinduced insulator-to-metal transition in ZnO/Mg_<0.15>Zn_<0.85>O heterostructures (2008)
  • Author(s): A. Tsukazaki, A. Ohtomo, M. Nakano, M. Kawasaki
  • Journal Title: Applied Physics Letters 92 Pages: 052105-1-3
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Surface and interface engineering and observation of quantum transport in ZnO based heterojunctions (2008)
  • Author(s): A. Ohtomo, A. Tsukazaki, M. Kawasaki
  • Journal Title: Surface Science (Japanese) 29(1) Pages: 10-17
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Schottky contact on a ZnO (0001) single crystal with conducting polymer (2007)
  • Author(s): M. Nakano, A. Tsukazaki, R.Y. Gunji, K. Ueno, A. Ohtomo, T. Fukumura, M. Kawasaki
  • Journal Title: Applied Physics Letters 91 Pages: 142113-1-3
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] Insulator-to-metal transition of ZnO by electric double layer gating (2007)
  • Author(s): H. Shimotani, H. Asanuma, A. Tsukazaki, A. Ohtomo, M. Kawasaki, Y. Iwasa
  • Journal Title: Applied Physics Letters 91 Pages: 082106-1-3
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] Recombination dynamics of excitons in Mg_<0.11>Zn_<0.89>O alloy films grown using the high-temperature-annealed self-buffer layer by laser-assisted molecular-beam epitaxy (2007)
  • Author(s): M. Kubota, T. Onuma, A. Tsukazaki, A. Ohtomo, M. Kawasaki, T. Sota, S.F. Chichibu
  • Journal Title: Applied Physics Letters 90 Pages: 141903-1-3
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] Quantum Hall effect in polar oxide heterostructures (2007)
  • Author(s): A. Tsukazaki, A. Ohtomo, T. Kita, Y. Ohno, H. Ohno, M. Kawasaki
  • Journal Title: Science 315 Pages: 1388-1391
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] ZnO/MgZnO界面における量子ホール効果 (2007)
  • Author(s): 塚崎 敦, 大友 明, 北 智洋, 大野裕三, 大野英男, 川崎雅司
  • Journal Title: 固体物理 42(9) Pages: 559-567
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] 非磁性絶縁体の境界が強磁性金属に (2007)
  • Author(s): 大友 明
  • Journal Title: パリティ 22(10) Pages: 39-42
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Invisible electronics now in sight (2007)
  • Author(s): A. Ohtomo
  • Journal Title: The Japan Journal 4(3) Pages: 27
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] 目に見えない電子回路につながる半導体技術-透明な酸化物半導体の量子ホール効果を世界で初めて観測- (2007)
  • Author(s): 大友 明
  • Journal Title: 電子情報通信学会誌 90(7) Pages: 563-564
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] ZnOの量子ホール効果 (2007)
  • Author(s): 大友 明, 塚崎 敦, 北 智洋, 大野裕三, 大野英男, 川崎雅司
  • Journal Title: 応用電子物性分科会誌 13(2) Pages: 73-78
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Schottky contact on a ZnO (0001) single crystal with conducting polymer (2007)
  • Author(s): M. Nakano, A. Tsukazaki, R. Y. Gunji, K. Ueno, A. Ohtomo, T. Fukumura, M. Kawasaki
  • Journal Title: Applied Physics Letters 91 Pages: 142113-1-3
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Recombination dynamics of excitons in Mg_<0.11>Zn_<0.89>O alloy films grown using the high-temperature-annealed self-buffer layer by laser-assisted molecular-beam epitaxy (2007)
  • Author(s): M. Kubota, T. Onuma, A. Tsukazaki, A. Ohtomo, M. Kawasaki, T. Sota, S. F. Chichibu
  • Journal Title: Applied Physics Letters 90 Pages: 141903-1-3
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Quantum Hall effect at ZnO/MgZnO interfaces (2007)
  • Author(s): A. Tsukazaki, A. Ohtomo, T. Kita, Y. Ohno, H. Ohno
  • Journal Title: Solid State Physics (Japanese) 42(9) Pages: 559-567
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Interface between nonmagnetic insulators may be ferromagnetic and conducting (2007)
  • Author(s): A. Ohtomo
  • Journal Title: Parity (Japanese) 22(10) Pages: 39-42
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Semiconductor technology towards invisible electronics- The first observation of quantum Hall effect in a transparent oxide semiconductor (2007)
  • Author(s): A. Ohtomo
  • Journal Title: Denshijyouhoutsuushingakkaishi (Japanese) 90(7) Pages: 563-564
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Quantum Hall effect in ZnO (2007)
  • Author(s): A. Ohtomo, A. Tsukazaki, T. Kita, Y. Ohno, H. Ohno
  • Journal Title: Ohyoudenshibusseibunkakaishi (Japanese) 13(2) Pages: 73-78
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] 「研究成果報告書概要(欧文)」より (2007)
  • Author(s): M. Kawasaki, A. Ohtomo (coauthor)
  • Journal Title: Wide Bandgap Semiconductors and Related Optoelectronic Devices (Springer-Verlag GmbH) Pages: 131140
• [Journal Article] Analysis of time-resolved donor-acceptor photoluminescence of N-doped ZnO (2006)
  • Author(s): T. Makino, A. Tsukazaki, A. Ohtomo, M. Kawasaki, H. Koinuma
  • Journal Title: Journal of the Physical Society of Japan 75 Pages: 095001-1-3
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] Hole transport in p-type ZnO (2006)
  • Author(s): T. Makino, A. Tsukazaki, A. Ohtomo, M. Kawasaki, H. Koinuma
  • Journal Title: Japanese Journal of Applied Physics 45 Pages: 6346-635
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] Photo-irresponsive thin-film transistor with Mg_xZn_<1-x>O channel (2006)
  • Author(s): A. Ohtomo, S. Takagi, K. Tamura, T. Makino, Y. Segawa, H. Koinuma, M. Kawasaki
  • Journal Title: Japanese Journal of Applied Physics 45 Pages: L694-L696
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] Shifting donor-acceptor photoluminescence in N-doped ZnO (2006)
  • Author(s): T. Makino, A. Tsukazaki, A. Ohtomo, M. Kawasaki, H. Koinuma
  • Journal Title: Journal of the Physical Society of Japan 75 Pages: 073701-1-4
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] Improvements in quantum efficiency of excitonic emissions in ZnO epilayers by the elimination of point defects (2006)
  • Author(s): S. F. Chichibu, T. Onuma, M. Kubota, A. Uedono, T. Sots, A. Tsukazaki, A. Ohtomo, M. Kawasaki
  • Journal Title: Journal of Applied Physics 99 Pages: 093505-1-6
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] High-mobility electron transport in ZnO thin films (2006)
  • Author(s): A. Tsukazaki, A. Ohtomo, M. Kawasaki
  • Journal Title: Applied Physics Letters 88 Pages: 152106-1-3
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] Improvements in quantum efficiency of excitonic emissions in ZnO epilayers by the elimination of point defects (2006)
  • Author(s): S. F. Chichibu, T. Onuma, M. Kubota, A. Uedono, T. Sota, A. Tsukazaki, A. Ohtomo, M. Kawasaki
  • Journal Title: Journal of Applied Physics 99 Pages: 093505-1-6
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] Atomically controlled heteroepitaxy of ZnO enabling UV emitting and quantum Hall devices (Invited) (2008)
  • Author(s): A. Tsukazaki, A. Ohtomo, M. Kawasaki
  • Organizer: The Minerals, Metals and Materials Society (TMS) 2008 Annual Meeting & Exhibition
  • Place of Presentation: New Orleans, USA
  • Year and Date: 20080909-13
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] 酸化物ヘテロ界面の原子レベルエピタキシーと量子化伝導(招待) (2008)
  • Author(s): 大友 明, 塚崎 敦, 川崎雅司
  • Organizer: 第55回応用物理学関係連合講演会シンポジウム機能性酸化物エレクトロニクスの新展開
  • Place of Presentation: 船橋
  • Year and Date: 20080326-30
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] 分子線エピタキシー法(MBE)によるZn極性面ZnO基板上MgZnO/ZnOヘテロ構造 (2008)
  • Author(s): 中原 健, 湯地洋行, 赤坂俊輔, 田村謙太郎, 西本宜央, 高水大樹, 佐々木 敦, 藤井哲雄, 田辺哲弘, 高須秀視, 塚崎 敦, 大友 明, 天池弘明, 尾沼猛儀, 秩父重英, 川崎雅司
  • Organizer: 2008年春季 第55回応用物理学関係連合講演会
  • Place of Presentation: 船橋
  • Year and Date: 20080326-30
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] PEDOT:PSS/ZnOショットキー接合界面の評価及びヘテロ構造への適用 (2008)
  • Author(s): 中野匡規, 塚崎 敦, 郡司遼佑, 上野和紀, 大友 明, 福村知昭, 湯地洋行, 中原 健, 川崎雅司
  • Organizer: 2008年春季 第55回応用物理学関係連合講演会
  • Place of Presentation: 船橋
  • Year and Date: 20080326-30
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] PEDOT:PSS/ZnOショットキー接合のフォトダイオード特性 (2008)
  • Author(s): 中野匡規, 牧野哲征, 郡司遼佑, 上野和紀, 大友 明, 福村知昭, 湯地洋行, 中原 健, 川崎雅司
  • Organizer: 2008年春季 第55回応用物理学関係連合講演会
  • Place of Presentation: 船橋
  • Year and Date: 20080326-30
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] PEDOT: PSS/APTEOS/-c面ZnOショットキー接合 (2008)
  • Author(s): 郡司遼佑, 中野匡規, 塚崎 敦, 大友 明, 福村知昭, 川崎雅司
  • Organizer: 2008年春季 第55回応用物理学関係連合講演会
  • Place of Presentation: 船橋
  • Year and Date: 20080326-30
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] Quantized transport properties in atomically engineered oxide heteroiriterfaces (invited) (2008)
  • Author(s): A. Ohtomo, A. Tsukazaki, M. Kawasaki
  • Organizer: The 55^<th> Annual Spring Meeting of Japanese Society of Applied Physics
  • Place of Presentation: Funabashi, Japan
  • Year and Date: 20080326-30
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] MgZnO/ZnO heterostructures grown on the Zn-polar ZnO substrates by molecular beam epitaxy (2008)
  • Author(s): K. Nakahara, H. Yuji, S. Akasaka, K Tamura, Y. Nishimoto, D. Takamizu, A. Sasaki, T. Fujii, T. Tanabe, H. Takasu, A. Tsukazaki, A. Ohtomo, H. Amaike, T. Onuma, S. F. Chichibu, M. Kawasaki
  • Organizer: The 55^<th> Annual Spring Meeting of Japanese Society of Applied Physics
  • Place of Presentation: Funabashi, Japan
  • Year and Date: 20080326-30
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] Characterization of PEDOTTSS / ZnO Schottky junctions and its application to heterostructures (2008)
  • Author(s): M. Nakano, A. Tsukazaki, R. Y. Gunji, K Ueno, A. Ohtomo, T. Fukumura, H. Yuji, K. Nakahara, M. Kawasaki
  • Organizer: The 55^<th> Annual Spring Meeting of Japanese Society of Applied Physics
  • Place of Presentation: Funabashi, Japan
  • Year and Date: 20080326-30
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] Photodiode properties of PEDOT: PSS / ZnO Schottky junctions (2008)
  • Author(s): M. Nakano, T. Makino, R. Y. Gunji, K. Ueno, A. Ohtomo, T. Fukumura, H. Yuji, K. Nakahara, M. Kawasaki
  • Organizer: The 55^<th> Annual Spring Meeting of Japanese Society of Applied Physics
  • Place of Presentation: Funabashi, Japan
  • Year and Date: 20080326-30
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] PEDOT:PSS / APTEOS / -c-plane ZnO Schottky junctions (2008)
  • Author(s): R. Y. Gunji, M. Nakano, A. Tsukazaki, A. Ohtomo, T. Fukumura, M. Kawasaki
  • Organizer: The 55^<th> Annual Spring Meeting of Japanese Society of Applied Physics
  • Place of Presentation: Funabashi, Japan
  • Year and Date: 20080326-30
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] 界面における電子状態・・・酸化物で何を測りたいか(招待) (2008)
  • Author(s): 大友 明
  • Organizer: ERLサイエンス研究会1
  • Place of Presentation: つくば
  • Year and Date: 20080316-17
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] Electronic properties of interfaces- What do we need to measure (2008)
  • Author(s): A. Ohtomo
  • Organizer: ERL Science Symposiuml
  • Place of Presentation: Tsukuba, Japan
  • Year and Date: 20080316-17
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] Atomically controlled heteroepitaxy of ZnO enabling UV emitting and quantum Hall devices (Invited) (2008)
  • Author(s): A. Tsukazaki, A. Ohtomo, M. Kawasaki
  • Organizer: The Minerals, Metals and Materials Society (TMS) 2008 Annual Meeting & Exhibition
  • Place of Presentation: New Orleans, USA.
  • Year and Date: 20080309-13
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] Conducting polymer/ZnO Schottky junction toward transparent oxide electronics (2008)
  • Author(s): M. Nakano, A. Tsukazaki, K. Ueno, R. Y. Gunji, A. Ohtomo, T. Fukumura, M. Kawasaki
  • Organizer: WPI & IFCAM Joint Workshop "Challenge of Interdisciplinary Materials Science to Technological Innovation of the 21st Century"
  • Place of Presentation: Sendai, Japan
  • Year and Date: 20080218-19
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] Characterization of Linear and Nonlinear Optical Properties in ZnO-related Quantum Well Structures (2008)
  • Author(s): T. Makino, A, Tsukazaki, A. Ohtomo, Y. Segawa, M. Kawasaki
  • Organizer: WPI & IFCAM Joint Workshop "Challenge of Interdisciplinary Materials Science to Technological Innovation of the 21st Century"
  • Place of Presentation: Sendai, Japan
  • Year and Date: 20080218-19
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] Quantum Hall effect in ZnO (2008)
  • Author(s): A. Ohtomo, A. Tsukazaki, T. Kita, Y. Ohno, H. Ohno, K. Nakahara, H. Yuji, K. Tamura, S. Akasaka, H. Takasu, M. Kawasaki
  • Organizer: WPI & IFCAM Joint Workshop "Challenge of Interdisciplinary Materials Science to Technological Innovation of the 21st Century"
  • Place of Presentation: Sendai, Japan
  • Year and Date: 20080218-19
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] Conducting polymer / ZnO Schottky junction toward transparent oxide electronics (2008)
  • Author(s): M. Nakano, A. Tsukazaki, K. Ueno, R. Y. Gunji, A. Ohtomo, T. Fukumura, M. Kawasaki
  • Organizer: WPI & IFCAM Joint Workshop "Challenge of Interdisciplinary Materials Science to Technological Innovation of the 21st Century"
  • Place of Presentation: Sendai
  • Year and Date: 20080218-19
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] Characterization of Linear and Nonlinear Optical Properties in ZnO-related Quantum Well Structures (2008)
  • Author(s): T. Makino, A. Tsukazaki, A. Ohtomo, Y. Segawa, M. Kawasaki
  • Organizer: WPI & IFCAM Joint Workshop "Challenge of Interdisciplinary Materials Science to Technological Innovation of the 21st Century"
  • Place of Presentation: Sendai
  • Year and Date: 20080218-19
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] Quantum Hall effect in ZnO (2008)
  • Author(s): A. Ohtomo, A. Tsukazaki, T. Kita, Y. Ohno, H. Ohno, K Nakahara, H. Yuji, K. Tamura, S. Akasaka, H. Takasu, M. Kawasaki
  • Organizer: WPI & IFCAM Joint Workshop "Challenge of Interdisciplinary Materials Science to Technological Innovation of the 21st Century"
  • Place of Presentation: Sendai
  • Year and Date: 20080218-19
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] 分極した酸化物界面における高移動度電子ガスの形成 (2008)
  • Author(s): 大友 明
  • Organizer: 平成19年度東京工業大学応用セラミックス研究所ワークショップ酸化物エピタキシーの表面界面制御と機能開発
  • Place of Presentation: 横浜
  • Year and Date: 20080128-29
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] Formation of high mobility electron gas at polar oxide interfaces (2008)
  • Author(s): A. Ohtomo
  • Organizer: Tokyo Tech Materials and Structure Laboratories Workshop on Control of Surfaces and Interfaces in Oxide Heterostructures and Developments of Its Functionality
  • Place of Presentation: Yokohama, Japan
  • Year and Date: 20080128-29
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] MgZnO homoepitaxial films grown by molecular beam epitaxy (2008)
  • Author(s): H. Yuji, K. Nakahara, K. Tamura, S. Akasada, A. Sasaki, H. Amaike, A. Tsukazaki, T. Onuma, S. F. Chichibu, A. Tsukazaki, A. Ohtomo, M. Kawasaki
  • Organizer: SPIE Photonics West2008 Zinc Oxide Materials and Devices III
  • Place of Presentation: San Jose, USA
  • Year and Date: 20080119-24
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] Homoepitaxial MgZnO grown by molecular beam epitaxy toward ultraviolet light-emitting diodes (Invited) (2008)
  • Author(s): K. Nakahara, H. Yuji, K. Tamura, S. Akasaka, A. Sasaki, Y. Nishimoto, D. Takamizu, T. Fujii, T. Tanabe, H. Takasu, H. Amaike, T. Onuma, S. F. Chichibu, A. Tsukazaki, A. Ohtomo, M. Kawasaki
  • Organizer: SPIE Photonics West2008 Zinc Oxide Materials and Devices III
  • Place of Presentation: San Jose, USA
  • Year and Date: 20080119-24
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] MgZnO homoepitaxial films grown by molecular beam epitaxy (2008)
  • Author(s): H. Yuji, K. Nakahara, K. Tamura, S. Akasada, A. Sasaki, H. Amaike, A. Tsukazaki, T. Onuma, S. F. Chichibu, A. Tsukazaki, A. Ohtomo, M. Kawasaki
  • Organizer: SPIE Photonics West2008 Zinc Oxide Materials and Devices III
  • Place of Presentation: San Jose, USA.
  • Year and Date: 20080119-24
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] Homoepitaxial MgZnO grown by MBE toward UV LEDs (Invited) (2008)
  • Author(s): K. Nakahara, H. Yuji, K. Tamura, S. Akasaka, A. Sasaki, Y. Nishimoto, D. Takamizu, T. Fujii, T. Tanabe, H. Takasu, H. Amaike, T. Onuma, S. F. Chichibu, A. Tsukazaki, A. Ohtomo, M. Kawasaki
  • Organizer: SPIE Photonics West2008 Zinc Oxide Materials and Devices III
  • Place of Presentation: San Jose, USA.
  • Year and Date: 20080119-24
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] Conducting polymer/ZnO Schottky junctions and their applications (2008)
  • Author(s): M. Nakano, A. Tsukazakil, K. Ueno, R. Y. Gunji, A. Ohtomo, T. Fukumura, M. Kawasaki
  • Organizer: 東北大学グローバルCOEプログラム材料インテグレーション国際教育研究拠点
  • Place of Presentation: 仙台
  • Year and Date: 2008-03-14
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] PEDOT: PSS Schottky contact on protected-c surface of ZnO by silane-coupling agent (2008)
  • Author(s): R. Y. Gunji, M. Nakano, A. Tsukazaki, A. Ohtomo, T. Fukumura, M. Kawasaki
  • Organizer: 東北大学グローバルCOEプログラム材料インテグレーション国際教育研究拠点
  • Place of Presentation: 仙台
  • Year and Date: 2008-03-14
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] Conducting polymer / ZnO Schottky junctions and their applications (2008)
  • Author(s): M. Nakano, A. Tsukazakil, K Ueno, R. Y. Gunji, A. Ohtomo, T. Fukumura, M. Kawasaki
  • Organizer: Grobal COE Program "Materials Integration International Center of Education Research"
  • Place of Presentation: Sendai, Japan
  • Year and Date: 2008-03-14
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] PEDOTPSS Schottky contact on protected -c surface of ZnO by silane-coupling agent (2008)
  • Author(s): R. Y. Gunji, M. Nakano, A. Tsukazaki, A. Ohtomo, T. Fukumura, M. Kawasaki
  • Organizer: Grobal COE Program "Materials Integration International Center of Education Research"
  • Place of Presentation: Sendai, Japan
  • Year and Date: 2008-03-14
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] 透明酸化物界面の高移動度伝導(招待) (2008)
  • Author(s): 大友 明, 塚崎 敦, 川崎雅司
  • Organizer: 学振154委員会研究会透明エレクトロニクス
  • Place of Presentation: 東京
  • Year and Date: 2008-01-25
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] High mobility transport in transparent oxide interfaces (invited) (2008)
  • Author(s): A. Ohtomo, A. Tsukazaki, M. Kawasaki
  • Organizer: The JSPS 154^<th> Committee Meeting of Transparent Electronics
  • Place of Presentation: Tokyo, Japan
  • Year and Date: 2008-01-25
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] プラズマ支援型分子線エピタキシー法(PAMBE)による+C面ZnO基板上ヘテロ構造(招待) (2007)
  • Author(s): 中原 健, 湯地洋行, 田村謙太郎, 赤坂俊輔, 高水大樹, 西本宜央, 藤井哲雄, 佐々木敦, 塚崎 敦, 大友 明, 川崎雅司, 尾沼猛儀, 天池弘明, 秩父重英
  • Organizer: 平成19年度金研ワークショップ 酸化亜鉛半導体テクノロジーの進歩
  • Place of Presentation: 仙台
  • Year and Date: 20071220-21
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] MgZnOのMBE成長におけるZnO基板OFF角依存 (2007)
  • Author(s): 湯地洋行, 中原 健, 田村謙太郎, 赤坂俊輔, 塚崎 敦, 大友 明, 川崎雅司, 尾沼猛儀, 秩父重英
  • Organizer: 平成19年度金研ワークショップ 酸化亜鉛半導体テクノロジーの進歩
  • Place of Presentation: 仙台
  • Year and Date: 20071220-21
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] MBE成長MgZnOのTRPL (2007)
  • Author(s): 田村謙太郎, 中原 健, 湯地洋行, 赤坂俊輔, 高水大樹, 西本宜央, 佐々木敦, 塚崎 敦, 大友 明, 川崎雅司, 尾沼猛儀, 秩父重英
  • Organizer: 平成19年度金研ワークショップ 酸化亜鉛半導体テクノロジーの進歩
  • Place of Presentation: 仙台
  • Year and Date: 20071220-21
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] PAMBE成長Zn極性MgZnO膜の表面平坦性の成長条件依存性 (2007)
  • Author(s): 赤坂俊輔, 中原 健, 湯地洋行, 田村謙太郎, 塚崎 敦, 大友 明, 川崎雅司, 尾沼猛儀, 秩父重英
  • Organizer: 平成19年度金研ワークショップ 酸化亜鉛半導体テクノロジーの進歩
  • Place of Presentation: 仙台
  • Year and Date: 20071220-21
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] PAMBE growth of ZnO based heterostructures on the +c-surface of ZnO substrates (invited) (2007)
  • Author(s): K Nakahara, H. Yuji, K Tamura, S. Akasaka, D. Takamizu, Y. Nishimoto, T. Fujii, A. Sasaki, A. Tsukazaki, A. Ohtomo, M. Kawasaki, T. Onuma, H. Amaike, S. F. Chichibu
  • Organizer: IMR Workshop on ZnO Semiconductor Technology
  • Place of Presentation: Sendai, Japan
  • Year and Date: 20071220-21
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] Influence of miscut ZnO substrates on MBE grown MgZnO epilayers (2007)
  • Author(s): H. Yuji, K. Nakahara, K. Tamura, S. Akasaka, A. Tsukazaki, A. Ohtomo, M. Kawasaki, T. Onuma, S. F. Chichibu
  • Organizer: IMR Workshop on ZnO Semiconductor Technology
  • Place of Presentation: Sendai, Japan
  • Year and Date: 20071220-21
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] Time resolved photoluminescence in MBE grown MgZnO epilayers (2007)
  • Author(s): K. Tamura, K. Nakahara, H. Yuji, S. Akasaka, D. Takamizu, Y. Nishimoto, A. Sasaki, A. Tsukazaki, A. Ohtomo, M. Kawasaki, T. Onuma, S. F. Chichibu
  • Organizer: IMR Workshop on ZnO Semiconductor Technology
  • Place of Presentation: Sendai, Japan
  • Year and Date: 20071220-21
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] Grwoth condiition dependence of surface morphology in MgZnO epilayers grown on the Zn surface of ZnO substrates by PAMBE (2007)
  • Author(s): S. Akasaka, K. Nakahara, H. Yuji, K Tamura, A. Tsukazaki, A. Ohtomo, M. Kawasaki, T. Onuma, S. F. Chichibu
  • Organizer: IMR Workshop on ZnO Semiconductor Technology
  • Place of Presentation: Sendai, Japan
  • Year and Date: 20071220-21
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] PEDOT: PSS/ZnO Schottky junction (2007)
  • Author(s): M. Nakano, A. Tsukazaki, R.Y. Gunji, K. Ueno, A. Ohtomo, T. Fukumura, M. Kawasaki
  • Organizer: The 2nd Korea University/IMR Student Exchange Seminar
  • Place of Presentation: Seoul, Korea
  • Year and Date: 20071217-19
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] PEDOT: PSS Schottky contact on -c surface of ZnO with silane-coupling treatment (2007)
  • Author(s): R.Y. Gunji, M. Nakano, A. Tsukazaki, A. Ohtomo, T. Fukumura, M. Kawasaki
  • Organizer: The 2nd Korea University/IMR Student Exchange Seminar
  • Place of Presentation: Seoul, Korea
  • Year and Date: 20071217-19
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] PEDOT:PSS/ZnO Schottky junction (2007)
  • Author(s): M. Nakano, A. Tsukazaki, R. Y. Gunji, K Ueno, A. Ohtomo, T. Fukumura, M. Kawasaki
  • Organizer: The 2nd Korea University / IMR Student Exchange Seminar
  • Place of Presentation: Seoul, Korea
  • Year and Date: 20071217-19
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] PEDOT:PSS Schottky contact on c surface of ZnO with silane-coupling treatment (2007)
  • Author(s): R. Y. Gunji, M. Nakano, A. Tsukazaki, A. Ohtomo, T. Fukumura, M. Kawasaki
  • Organizer: The 2nd Korea University / IMR Student Exchange Seminar
  • Place of Presentation: Seoul, Korea
  • Year and Date: 20071217-19
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] Quantum Hall effect in ZnO (2007)
  • Author(s): A. Ohtomo, A. Tsukazaki, T. Kita, Y. Ohno, H. Ohno, M. Kawasaki
  • Organizer: 2007 MRS Fall Meeting
  • Place of Presentation: Boston, USA
  • Year and Date: 20071126-30
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] Conducting polymer/oxide semiconductor Schottky junctions (2007)
  • Author(s): M. Nakano, T. Fukumura, K. Ueno, A. Tsukazaki, R. Y. Gunji, Y. Yamada, A. Ohtomo, M. Kawasaki
  • Organizer: 2007 MRS Fall Meeting
  • Place of Presentation: Boston, USA
  • Year and Date: 20071126-30
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] Polymer Schottky Contact on Polar ZnO Surfaces (2007)
  • Author(s): R. Y. Gunji, M. Nakano, A. Tsukazaki, A. Ohtomo, T. Fukumura, M. Kawasaki
  • Organizer: 2007 MRS Fall Meeting
  • Place of Presentation: Boston, USA
  • Year and Date: 20071126-30
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] Quantum Hall effect in ZnO (2007)
  • Author(s): A. Ohtomo, A. Tsukazaki, T- Kita, Y. Ohno, H. Ohno, M. Kawasaki
  • Organizer: 2007 MRS Fall Meeting
  • Place of Presentation: Boston, USA.
  • Year and Date: 20071126-30
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] Conducting polymer / oxide semiconductor Schottky junctions (2007)
  • Author(s): M. Nakano, T. Fukumura, K Ueno, A. Tsukazaki, R. Y. Gunji, Y. Yamada, A. Ohtomo, M. Kawasaki
  • Organizer: 2007 MRS Fall Meeting
  • Place of Presentation: Boston, USA.
  • Year and Date: 20071126-30
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] Polymer Schottky Contact on Polar ZnO Surfaces (2007)
  • Author(s): R. Y. Gunji, M. Nakano, A. Tsukazaki, A. Ohtomo, T. Fukumura, M. Kawasaki
  • Organizer: 2007 MRS Fall Meeting
  • Place of Presentation: Boston, USA.
  • Year and Date: 20071126-30
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] Quantized electronic states in polar oxide heterointerfaces(Invited) (2007)
  • Author(s): A. Ohtomo, A. Tsukazaki, Y. F. Yamada, M. Kawasaki
  • Organizer: 9th International Conference on Atomically Controlled Surfaces, Interface and Nanostructures(ACSIN-9)
  • Place of Presentation: Tokyo,Japan
  • Year and Date: 20071111-15
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] Quantized electronic states in polar oxide heterointerfaces (Invited) (2007)
  • Author(s): A. Ohtomo, A. Tsukazaki, Y. F. Yamada, M. Kawasaki
  • Organizer: 9th International Conference on Atomically Controlled Surfaces, Interfaces and Nanostructures (ACSIN-9)
  • Place of Presentation: Tokyo
  • Year and Date: 20071111-15
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] Oxide semiconductor quantum electronics(Invited) (2007)
  • Author(s): A. Ohtomo
  • Organizer: The 34th International Symposium on Compound Semiconductors
  • Place of Presentation: Kyoto, Japan
  • Year and Date: 20071015-18
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] Two-dimensional transport of photoinduced electrons in ZnO/Mg^<0.15>Mg^<0.85>O heterostrucrtures (2007)
  • Author(s): A. Tsukazaki, M. Nakano, A. Ohtomo, M. Kawasaki
  • Organizer: The 34th International Symposium on Compound Semiconductors
  • Place of Presentation: Kyoto, Japan
  • Year and Date: 20071015-18
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] Oxide semiconductor quantum electronics (Invited) (2007)
  • Author(s): A. Ohtomo
  • Organizer: The 34th International Symposium on Compound Semiconductors
  • Place of Presentation: Kyoto
  • Year and Date: 20071015-18
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] Two-dimensional transport of photoinduced electrons in ZnO / Mg_<0.15>Mg_<0.85>O heterostrucrtures (2007)
  • Author(s): A. Tsukazaki, M. Nakano, A. Ohtomo, M. Kawasak
  • Organizer: The 34th International Symposium on Compound Semiconductors
  • Place of Presentation: Kyoto
  • Year and Date: 20071015-18
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] Quantized magnetotransport in oxide heterostructures(Invited) (2007)
  • Author(s): A. Ohtomo, A. Tsukazaki, M. Kawasaki
  • Organizer: The 14th International Workshop on Oxide Electronics
  • Place of Presentation: Jeju island, Korea
  • Year and Date: 20071007-10
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] Quantized magnetotransport in oxide heterostructures (Invited) (2007)
  • Author(s): A. Ohtomo, A. Tsukazaki, M. Kawasaki
  • Organizer: The 14th International Workshop on Oxide Electronics
  • Place of Presentation: Jeju island, Korea
  • Year and Date: 20071007-10
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] 酸化物薄膜とデバイス(招待) (2007)
  • Author(s): 大友 明
  • Organizer: 第10回薄膜基礎講座
  • Place of Presentation: 東京
  • Year and Date: 20070912-13
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] Oxide thin films and devices (invited) (2007)
  • Author(s): A. Ohtomo
  • Organizer: The 10^<th> Thin Films Seminar
  • Place of Presentation: Tokyo, Japan
  • Year and Date: 20070912-13
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] 透明トランジスタの現状 (2007)
  • Author(s): 大友 明
  • Organizer: JSTナノと物性懇話会
  • Place of Presentation: 札幌
  • Year and Date: 20070908-09
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] Current status of transparent transistors (2007)
  • Author(s): A. Ohtomo
  • Organizer: JST Nanostructures and properties Meeting
  • Place of Presentation: Sapporo, Japan
  • Year and Date: 20070908-09
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] 導電性高分子を金属電極に用いた-c面ZnOショットキー接合の作製と電気特性 (2007)
  • Author(s): 郡司遼佑, 中野匡規, 塚崎 敦, 大友 明, 福村知昭, 川崎雅司
  • Organizer: 2007年秋季 第68回応用物理学会学術講演会
  • Place of Presentation: 札幌
  • Year and Date: 20070904-08
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] 導電性高分子/酸化物半導体ショットキー接合の温度特性 (2007)
  • Author(s): 中野匡規, 福村知昭, 上野和紀, 塚崎 敦, 郡司遼佑, 山田良則, 大友 明, 川崎雅司
  • Organizer: 2007年秋季 第68回応用物理学会学術講演会
  • Place of Presentation: 札幌
  • Year and Date: 20070904-08
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] Fabrication and electrical properties of Schottky junctions between the -c surface of ZnO and a conducting polymer (2007)
  • Author(s): R. Y. Gunji, M. Nakano, A. Tsukazaki, A. Ohtomo, T. Fukumura, M. Kawasaki
  • Organizer: The 68^<th> Annual Fall Meeting of Japanese Society of Applied Physics
  • Place of Presentation: Sapporo, Japan
  • Year and Date: 20070904-08
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] The temperature dependence of device characteristics of the conducting polymer / oxide semiconductor Schottky junction (2007)
  • Author(s): M. Nakano, T. Fukumura, KUeno, A. Tsukazaki, R. Y. Gunji, Y. Yamada, A. Ohtomo, M. Kawasaki
  • Organizer: The 68^<th> Annual Fall Meeting of Japanese Society of Applied Physics
  • Place of Presentation: Sapporo, Japan
  • Year and Date: 20070904-08
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] Quantum hall effect in polar oxide heterostructures (Invited) (2007)
  • Author(s): A. Ohtomo, A. Tsukazaki, T. Kita, Y. Ohno, H. Ohno, M. Kawasaki
  • Organizer: DFG-Kolloquium
  • Place of Presentation: Hannover, Germany
  • Year and Date: 20070629-30
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] 導電性高分子を用いたZnOショットキー接合の作製と電気特性 (2007)
  • Author(s): 郡司遼佑, 中野匡規, 塚崎 敦, 大友 明, 福村知昭, 川崎雅司
  • Organizer: 第113回東北大学金属材料研究所講演会
  • Place of Presentation: 仙台
  • Year and Date: 20070524-25
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] 導電性高分子を金属電極とするショットキー接合の作製と評価 (2007)
  • Author(s): 中野匡規, 福村知昭, 上野和紀, 塚崎 敦, 郡司遼佑, 大友 明, 川崎雅司
  • Organizer: 第113回東北大学金属材料研究所講演会
  • Place of Presentation: 仙台
  • Year and Date: 20070524-25
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] ZnO/MgZnO積層膜における光有機キャリアの伝導特性評価 (2007)
  • Author(s): 塚崎 敦, 中野匡規, 大友 明, 川崎雅司
  • Organizer: 第113回東北大学金属材料研究所講演会
  • Place of Presentation: 仙台
  • Year and Date: 20070524-25
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] Fabrication and characterization of conducting polymer/ZnO Schottky junctions (2007)
  • Author(s): R. Y. Gunji, M. Nakano, A. Tsukazaki, A. Ohtomo, T. Fukumura, M. Kawasaki
  • Organizer: 113^<th> Lecture Presentation in Institute for Materials Research
  • Place of Presentation: Sendai, Japan
  • Year and Date: 20070524-25
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] Fabrication and characterization of conducting polymer Schottky junctions (2007)
  • Author(s): M. Nakano, T. Fukumura, K. Ueno, A. Tsukazaki, R. Y. Gunji, A. ohtomo, M. Kawasaki
  • Organizer: 113^<th> Lecture Presentation in Institute for Materials Research
  • Place of Presentation: Sendai, Japan
  • Year and Date: 20070524-25
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] Photo-induced carrier transport in ZnO/MgZnO heterostructures (2007)
  • Author(s): A. Tsukazaki, M. Nakano, A. Ohtomo, M. Kawasaki
  • Organizer: 113^<th> Lecture Presentation in Institute for Materials Research
  • Place of Presentation: Sendai, Japan
  • Year and Date: 20070524-25
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] Photoinduced insulatof-to-metal transition in ZnO/Mg_rZn_<1-x>O heterostructures (2007)
  • Author(s): A. Tsukazaki, M. Nakano, A. Ohtomo, M. Kawasaki
  • Organizer: 2007 CERC International Symposium
  • Place of Presentation: Tokyo, Japan
  • Year and Date: 20070522-25
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] Photoinduced insulator-to-metal transition in ZnO/Mg_xZn_<1-x>O heterostructures (2007)
  • Author(s): A. Tsukazaki, M. Nakano, A. Ohtomo, M. Kawasaki
  • Organizer: 2007 CERC International Symposium
  • Place of Presentation: Tokyo
  • Year and Date: 20070522-25
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] 導電性高分子/酸化物半導体ショットキー接合 (2007)
  • Author(s): 中野匡規, 福村知昭, 上野和紀, 塚崎敦, 郡司遼祐, 大友 明, 川崎雅司
  • Organizer: 2007年春季 第54回応用物理学関係連合講演会
  • Place of Presentation: 相模原
  • Year and Date: 20070327-30
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] 分子線エピタキシー法(MBE)による(Mg)ZnOホモエピタキシー技術(招待) (2007)
  • Author(s): 中原 健, 湯地洋行, 田村謙太郎, 赤坂俊輔, 高水大樹, 田辺哲弘, 久保田将司, 尾沼猛儀, 秩父重英, 塚崎 敦, 大友 明, 川崎雅司
  • Organizer: 2007年春季 第54回応用物理学関係連合講演会
  • Place of Presentation: 相模原
  • Year and Date: 20070327-30
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] パルスレーザ堆積法によるZnO系ヘテロ接合の作製(招待) (2007)
  • Author(s): 大友 明, 塚崎 敦, 川崎雅司
  • Organizer: 2007年春季 第54回応用物理学関係連合講演会
  • Place of Presentation: 相模原
  • Year and Date: 20070327-30
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] ZnO/MgZnO積層膜の光誘起絶縁体-金属相転移 (2007)
  • Author(s): 塚崎 敦, 中野匡規, 大友 明, 川崎雅司
  • Organizer: 2007年春季 第54回応用物理学関係連合講演会
  • Place of Presentation: 相模原
  • Year and Date: 20070327-30
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] Conducting polymer/oxide semiconductors Schottky junctions (2007)
  • Author(s): M. Nakano, T. Fukumura, K. Ueno, A. Tsukazaki, R. Y. Gunji, A. Ohtomo, M. Kawasaki
  • Organizer: The 54^<th> Annual Spring Meeting of Japanese Society of Applied Physics
  • Place of Presentation: Sagamihara, Japan
  • Year and Date: 20070327-30
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] Homoepitaxial growth of MgZnO epilayers by molecular-beam epitaxy (invited) (2007)
  • Author(s): K Nakahara, H. Yuji, K. Tamura, S. Akasaka, D. Takamizu, T. Tanabe, M. Kubota, T. Onuma, S. F. Chichibu, A. Tsukazaki, A. Ohtomo, M. Kawasaki
  • Organizer: The 54^<th> Annual Spring Meeting of Japanese Society of Applied Physics
  • Place of Presentation: Sagamihara, Japan
  • Year and Date: 20070327-30
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] Pulsed-laser deposition of ZnO based heterostructures (2007)
  • Author(s): A. Ohtomo, A. Tsukazaki, M. Kawasaki
  • Organizer: The 54^<th> Annual Spring Meeting of Japanese Society of Applied Physics
  • Place of Presentation: Sagamihara, Japan
  • Year and Date: 20070327-30
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] Photo-induced metal-to-insulator transition in ZnO/MgZnO heterostructures (2007)
  • Author(s): A. Tsukazaki, M. Nakano, A. Ohtomo, M. Kawasaki
  • Organizer: The 54^<th> Annual Spring Meeting of Japanese Society of Applied Physics
  • Place of Presentation: Sagamihara, Japan
  • Year and Date: 20070327-30
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] Quantum Hall effect in polar ZnO/MgZnO heterostructures (Invited) (2007)
  • Author(s): A. Tsukazaki, A. Ohtomo, M. Kawasaki
  • Organizer: Seminar at Princeton University
  • Place of Presentation: New Jersey, USA
  • Year and Date: 2007-11-29
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] Quantum Hall effect in polar ZnO/MgZnO heterostructures (Invited) (2007)
  • Author(s): A. Tsukazaki, A. Ohtomo, M. Kawasaki
  • Organizer: Seminar at Princeton University
  • Place of Presentation: New Jersey, USA.
  • Year and Date: 2007-11-29
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] ZnO系紫外発光ダイオードの開発 (2007)
  • Author(s): 大友 明, 川崎雅司
  • Organizer: 第1回東北大学光科学技術フォーラム
  • Place of Presentation: 仙台
  • Year and Date: 2007-11-20
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] Realization of ZnO based ultraviolet light-emitting diodes (2007)
  • Author(s): A. Ohtomo, M. -Kawasaki
  • Organizer: The 1^<st> Tohoku University Optics Science and Technology Forum
  • Place of Presentation: Sendai, Japan
  • Year and Date: 2007-11-20
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] 透明酸化物エレクトロニクスに向けて -2次元電子ガスの制御と物性 (2007)
  • Author(s): 大友 明, 川崎雅司
  • Organizer: 新物性エレクトロニクスの基礎に関する東北大・名大合同研究会
  • Place of Presentation: 仙台
  • Year and Date: 2007-11-19
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] Towards invisible electronics (2007)
  • Author(s): A. Ohtomo, M. Kawasaki
  • Organizer: Tohoku-Nagoya Universities Joint Workshop on Electronics of New Materials and Properties
  • Place of Presentation: Sendai, Japan
  • Year and Date: 2007-11-19
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] High-mobility electron gas at polar oxide heterointerfaces(Invited) (2007)
  • Author(s): A. Ohtomo
  • Organizer: 2007 Millennium Science Forum
  • Place of Presentation: Tokyo,Japan
  • Year and Date: 2007-11-14
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] High-mobility electron gas at polar oxide heterointerfaces (Invited) (2007)
  • Author(s): A. Ohtomo
  • Organizer: 2007 Millennium Science Forum
  • Place of Presentation: Tokyo
  • Year and Date: 2007-11-14
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] Quantum confinement effects in ZnO based heterostructures (Invited) (2007)
  • Author(s): A. Ohtomo, A. Tsukazaki, M. Kawasaki
  • Organizer: CAP (Center of Applied Photonics at Konstanz University) Seminar
  • Place of Presentation: Konstanz, Germany
  • Year and Date: 2007-06-28
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] ZnOの量子ホール効果(招待) (2007)
  • Author(s): 大友 明, 塚崎 敦, 北 智洋, 大野裕三, 大野英男, 川崎雅司
  • Organizer: 応物学会応用電子物性分科会研究例会
  • Place of Presentation: 東京
  • Year and Date: 2007-06-12
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] Quantum Hall effect in ZnO (invited) (2007)
  • Author(s): A. Ohtomo, A. Tsukazaki, T. Kita, Y. Ohno, H. Ohno, M. Kawasaki
  • Organizer: The annual meeting of JSAP Ohyoudenshibusseibunkakai
  • Place of Presentation: Tokyo Japan
  • Year and Date: 2007-06-12
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] Investigation of quantum hall effect in polar oxide heterostructures (2007)
  • Author(s): A. Tsukazaki, A. Ohtomo, T. Kita, Y. Ohno, H. Ohno, M. Kawasaki
  • Organizer: IMR Workshop on Advanced Materials
  • Place of Presentation: Sendai, Japan
  • Year and Date: 2007-03-01
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] Investigation of quantum Hall effect in polar oxide heterostructures (2007)
  • Author(s): A. Tsukazaki, A. Ohtomo, T. Kita, Y. Ohno, H. Ohno, M. Kawasaki
  • Organizer: IMR Workshop on Advanced Materials
  • Place of Presentation: Sendai
  • Year and Date: 2007-03-01
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] ZnO系電界効果トランジスタと透明電子回路への応用(招待) (2007)
  • Author(s): 大友 明
  • Organizer: 第24回無機材料に関する最近の研究成果発表会-無機材料の新たな可能性を拓く-
  • Place of Presentation: 東京
  • Year and Date: 2007-01-22
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] ZnO field-effect transistors and its application to invisible electronics (invited) (2007)
  • Author(s): A. Ohtomo
  • Organizer: The 24^<th> Workshop on Recent Achievements in Inorganic Materials Research
  • Place of Presentation: Tokyo, Japan
  • Year and Date: 2007-01-22
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] Highly controlled epitaxy of ZnO for light emitting device (invited) (2006)
  • Author(s): A. Tsukazaki, A. Ohtomo, M. Kawasaki
  • Organizer: The 3rd International Symposium on Advanced Ceramics (ISAC-3)
  • Place of Presentation: Singapore, Singapore
  • Year and Date: 20061211-15
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] The observation of quantum Hall effect in ZnO/Mg_xZn_<1-x>O heterointerfaces (2006)
  • Author(s): A. Tsukazaki, A. Ohtomo, T. Kita, Y. Ohno, H. Ohno, M. Kawasaki
  • Organizer: The 13th International Workshop on Oxide Electronics
  • Place of Presentation: Ischia, Italy
  • Year and Date: 20061008-11
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] The observation of quantum Hall effect in ZnO/Mg_xZn_<1-_x>O heterointerfaces (2006)
  • Author(s): A. Tsukazaki, A. Ohtomo, T. Kita, Y. Ohno, H. Ohno, M. Kawasaki
  • Organizer: The 13th International Workshop on Oxide Electronics
  • Place of Presentation: Ischia, Italy
  • Year and Date: 20061008-11
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] High-Mobility Transport in the ZnO/Mg_xZn_<1-x>O Heterostructures (2006)
  • Author(s): A. Ohtomo, A. Tsukazaki, J. Nishii, H. Ohno, M. Kawasaki
  • Organizer: The 14th International Workshop on ZnO and Related Materials
  • Place of Presentation: Giessen, Germany
  • Year and Date: 20061003-06
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] High-Mobility Transport in the ZnO/Mg_xZn_<1-x>O Heterostructures (2006)
  • Author(s): A. Ohtomo, A. Tsukazaki, J. Nishii, H. Ohno, M. Kawasaki
  • Organizer: The 4th International Workshop on ZnO and Related Materials
  • Place of Presentation: Giessen, Germany
  • Year and Date: 20061003-06
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] ZnO発光ダイオードの開発(招待) (2006)
  • Author(s): 大友 明
  • Organizer: 技術情報協会セミナー「酸化亜鉛薄膜の大面積化技術と高品質発光デバイスへの応用」
  • Place of Presentation: 東京
  • Year and Date: 20060921-22
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] ZnO light-emitting diodes (invited) (2006)
  • Author(s): A. Ohtomo
  • Organizer: Technical Information Institute Seminar on Large-Area Fabrication of ZnO Thin Films and Its Application to High-Quality Light-Emitting Devices
  • Place of Presentation: Tokyo, Japan
  • Year and Date: 20060921-22
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] 酸化亜鉛薄膜成長技術と電子デバイス応用(招待) (2006)
  • Author(s): 大友 明, 塚崎 敦, 川崎雅司
  • Organizer: 日本学術振興会ワイドギャップ半導体光・電子デバイス第162委員会第48回研究会
  • Place of Presentation: 仙台
  • Year and Date: 20060913-14
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] Epitaxial growth of ZnO based heterostructures and its application to electric devices (2006)
  • Author(s): A. Ohtomo, A. Tsukazaki, M. Kawasaki
  • Organizer: The JSPS 162^<th> Committee Meeting of Wide Bandgap Semiconductor Optoelectronics Devices
  • Place of Presentation: Sendai, Japan
  • Year and Date: 20060913-14
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] Electronic structures of polar oxide heterointerfaces (invited) (2006)
  • Author(s): A. Ohtomo, P. Murugan, T. Nishimatsu, Y. Kawazoe, M. Kawasaki
  • Organizer: ACCMS Working Group Meeting on Clusters and Nanomaterials
  • Place of Presentation: Sendai, Japan
  • Year and Date: 20060907-09
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] Electronic structures of polar oxide heterointerfaces (invited) (2006)
  • Author(s): A. Ohtomo, P. Murugan, T. Nishimatsu, Y. Kawazoe, M. Kawasaki
  • Organizer: ACCMS Working Group Meeting on Clusters and Nanomaterials
  • Place of Presentation: Sendai
  • Year and Date: 20060907-09
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] Combinatorial technology towards ZnO-based light-emitting diodes (invited) (2006)
  • Author(s): A. Ohtomo, A. Tsukazaki, M. Kawasaki
  • Organizer: Asia-Pacific Optical Communications (APOC) 2006
  • Place of Presentation: Gwangju, Korea
  • Year and Date: 20060903-07
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] ZnO/Mg_χZn_<1-χ>O界面の分極電荷と二次元電子ガス密度の制御 (2006)
  • Author(s): 大友 明, 塚崎 敦, 北 智洋, 大野裕三, 大野英男, 川崎雅司
  • Organizer: 2006年秋季 第67回応用物理学関係連合講演会
  • Place of Presentation: 草津
  • Year and Date: 20060829-0901
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] Blue Light-Emitting Diode Based on ZnO(招待) (2006)
  • Author(s): 大友 明, 塚崎 敦, 川崎雅司
  • Organizer: 2006年秋季 第67回応用物理学関係連合講演会
  • Place of Presentation: 草津
  • Year and Date: 20060829-0901
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] Control of two-dimensional electron gases and polarization charges at the ZnOMg_xZn_<1-x>O heterointerfaces (2006)
  • Author(s): A. Ohtomo, A. Tsukazaki, T. Kita, Y. Ohno, H. Ohno, M. Kawasaki
  • Organizer: The 67^<th> Annual Fall Meeting of Japanese Society of Applied Physics
  • Place of Presentation: Kusatsu, Japan
  • Year and Date: 20060829-0901
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] Blue Light-Emitting Diode Based on ZnO (invited) (2006)
  • Author(s): A. Ohtomo, A. Tsukazaki, M. Kawasaki
  • Organizer: The 67^<th> Annual Fall Meeting of Japanese Society of Applied Physics
  • Place of Presentation: Kusatsu, Japan
  • Year and Date: 20060829-0901
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] The examination of magnetotransport in ZnO/Mg_χZn_<1-χ>O heterointerfaces (2006)
  • Author(s): A. Tsukazaki, A. Ohtomo, T. Kita, Y. Ohno, H. Ohno, M. Kawasaki
  • Organizer: KINKEN-WAKATE 2006 3rd Materials Science School for Young Scientists
  • Place of Presentation: Sendai, Japan
  • Year and Date: 20060826-28
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] The examination of magnetotransport in ZnO/Mg_xZn_<1-x>O heterointerfaces (2006)
  • Author(s): A. Tsukazaki, A.Ohtomo, T. Kita, Y. Ohno, H. Ohno, M. Kawasaki
  • Organizer: KINKEN-WAKATE 2006 3rd Materials Science School for Young Scientists
  • Place of Presentation: Sendai
  • Year and Date: 20060826-28
  • Description: 「研究成果報告書概要(欧文)」より
• [Book] Nanoparticle Technology Handbook (2007)
  • Author(s): A. Ohtomo
  • Total Pages: 312-315
  • Publisher: Elsevier, UK
  • Description: 「研究成果報告書概要(和文)」より
• [Book] Wide Bandgap Semiconductors and Related Optoelectronic Devices (2007)
  • Author(s): M. Kawasaki, A. Ohtomo
  • Total Pages: 131-140
  • Publisher: Springer-Verlag GmbH
  • Description: 「研究成果報告書概要(和文)」より
• [Book] Nanoparticle Technology Handbook (2007)
  • Author(s): A. Ohtomo(coauthor)
  • Publisher: Elsevier, UK
  • Description: 「研究成果報告書概要(欧文)」より
• [Patent(Industrial Property Rights)] Zinc oxide type semiconductor element e.g. for ultra violet LED, has projection axis of C-axis at m-axial plane inclined with respect to normal line of main surface of magnesium zinc oxide substrate (2007)
  • Inventor(s): K. Nakahara, H. Yuji, K. Tamura, S. Akasaka, M. Kawasaki, T. Tsukazaki, A. Ohtomo
  • Industrial Property Rights Holder: ローム株式会社, 国立大学法人東北大学長
  • Industrial Property Number: WO2008004405-A1
  • Filing Date: 2007-01-08
  • Description: 「研究成果報告書概要(和文)」より
  • Overseas