Magneto-optical study for the spin coherence in low dimensional electron systems at high magnetic fields

2009 Fiscal Year Final Research Report

• Project/Area Number: 17072006
• Research Category: Grant-in-Aid for Scientific Research on Priority Areas
• Allocation Type: Single-year Grants
• Review Section: Science and Engineering
• Research Institution: National Institute for Materials Science
• Principal Investigator: TAKAMASU Tadashi National Institute for Materials Science, 量子ドットセンター・ナノ物性グループ, 主幹研究員 (60212015)
• Co-Investigator(Kenkyū-buntansha): IMANAKA Yasutaka 独立行政法人物質・材料研究機構, 量子ドットセンター, 主任研究員 (70354371) ; TERASHIMA Taichi 独立行政法人物質・材料研究機構, ナノスケール物質萌芽ラボ, 主幹研究員 (40343834) ; KIDO Giyuu 独立行政法人物質・材料研究機構, 強磁場ステーション, ステーション長 (10013541) ; TAKEYAMA Shojiro 東京大学, 物性研究所, 教授 (20163446) ; KOJIMA Eiji 東京大学, 物性研究所, 助教 (10376650) ; TAKITA Hiroki 筑波大学, 物質工学系, 教授 (00011213) ; KURODA Shinji 筑波大学, 数理物質科学研究科, 教授 (40221949) ; YOKOI Hiroyuki 熊本大学, 工学部, 准教授 (50358305)
• Co-Investigator(Renkei-kenkyūsha): UJI Shinya 独立行政法人物質・材料研究機構, ナノ量子輸送グループ, グループリーダー (80344430)
• Project Period (FY): 2005 – 2009
• Keywords: 強磁場 / スピン科学 / 磁気光学 / 半導体 / 低次元 / 磁性半導体 / ナノチューブ / 有機伝導体

Research Abstract

We have studied spin properties of conduction electron in low dimensional electron systems by means of optical and other methods under very high magnetic fields. Several key aspects for realizing the manipulation and detection of the spin coherence state were obtained in GaAs/AlGaAs two dimensional electron systems. Significant spin-related phenomena and electronic properties are also observed in ZnCrTe, CdMnTe, carbon-nanotube and λ-(BETS)_2FeCl_4 under high magnetic fields.

Research Products

• [Journal Article] Cyclotron resonance of two-dimensional electron system affected by neighboring quantum dot layer (2010)
  • Author(s): K. Takehana, Y. Imanaka, T. Takamasu, M. Henini
  • Journal Title: Appl. Phys. Lett 96 Pages: 193110-1-3
  • Peer Reviewed
• [Journal Article] A Near-Infrared Spectroscopy in Magnetic Fields Above 100 T (2010)
  • Author(s): H. Yokoi, M. Effendi, E. Kojima, S. Takeyama
  • Journal Title: J. Low Temp. Phys. 159 Pages: 311-314
  • Peer Reviewed
• [Journal Article] Possible Phase Transition Deep Inside the Hidden Order Phase of Ultraclean URu2Si2 (2009)
  • Author(s): H. Shishido, K. Hashimoto, T. Shibauchi, T. Sasaki, H. Oizumi, N. Kobayashi, T. Takamasu, K. Takehana, Y. Imanaka, T.D. Matsuda, Y. Haga, Y. Onuki, Y. Matsuda
  • Journal Title: Phys. Rev. Lett. 102 Pages: 156403-1-4
  • Peer Reviewed
• [Journal Article] Optically Induced Long-Lived Electron Spin Coherence in ZnSe/BeTe Type-II Quantum Wells (2008)
  • Author(s): H. Mino, Y. Kouno, K. Oto, K. Muro, R. Akimoto, S. Takeyama
  • Journal Title: Appl. Phys. Lett. 92 Pages: 153101-1-3
  • Peer Reviewed
• [Journal Article] Fermi Surface in LaRhSi3 and CeRhSi3 (2008)
  • Author(s): T. Terashima, M. Kimata, S. Uji, T. Sugawara, N. Kimura, H. Aoki, H. Harima
  • Journal Title: Phys. Rev. 78 Pages: 205107-1-10
  • Peer Reviewed
• [Journal Article] Full-Magnetization of Geometrically Frustrated CdCr2O4 Determined by Faraday Rotation Measurements at Magnetic Fields up to 140 T (2008)
  • Author(s): E. Kojima, A. Miyata, S. Miyabe, S. Takeyama, H. Ueda
  • Journal Title: Y. Ueda, Phys. Rev. 77 Pages: 212408-1-4
  • Peer Reviewed
• [Journal Article] Spatially Direct Charged Exciton Photoluminescence in Undoped ZnSe/BeTe type-II Quantum Wells (2008)
  • Author(s): Z.W. Ji, S. Takeyama, H. Mino, K. Oto, K. Muro, R. Akimoto
  • Journal Title: Appl. Phys. Lett. 92 Pages: 093107-1-3
  • Peer Reviewed
• [Journal Article] Origin and Control of High-temperature Ferromagnetism in Semiconductors (2007)
  • Author(s): S. Kuroda, N. Ni shizawa, K. Takita, M. Mitome, Y. Bando, K. Osuch
  • Journal Title: T. Dietl, Nature Materials 6 Pages: 440-446
  • Peer Reviewed
• [Journal Article] Extremely High Upper Critical Magnetic Field of the Noncentrosymmetric Heavy Fermion Superconductor CeRhSi3 (2007)
  • Author(s): N. Kimura, K. Ito, H. Aoki, S. Uji, T. Terashima
  • Journal Title: Phys. Rev. Lett. 98 Pages: 197001-1-4
  • Peer Reviewed
• [Journal Article] Modification of the Quantum Hall Effect by the Charge State of a Nearby Quantum Dots Layer (2006)
  • Author(s): K. Takehana, T. Takamasu, M. Henini
  • Journal Title: J. Phys. Soc. Jpn. 75 Pages: 114713-1-6
  • Peer Reviewed
• [Journal Article] Photoluminescence of Yb3+-doped CuInS2 Single Crystals Prepared by In-flux and Chemical Vapor Transport Methods (2006)
  • Author(s): N. Tsujii, Y. Imanaka, T. Takamasu, H. Kitazawa
  • Journal Title: G. Kido, Journal of Alloys and Compounds 408-412 Pages: 791-795
  • Peer Reviewed
• [Journal Article] Vortex Dynamic and the Fulde-Ferrell-Larkin-Ovchinnikov State in a Magnetic-field-induced Organic Superconductor (2006)
  • Author(s): S. Uji, T. Terashima, M. Nishimura, Y. Takahide, T. Konoike, K. Enomoto, H. Cui, H. Kobayashi, A. Kobayashi, H. Tanaka, M. Tokumoto, E.S. Choi, T. Tokumoto, D. Graf
  • Journal Title: J.S. Brooks, Phys. Rev. Lett. 97 Pages: 157001-1-4
  • Peer Reviewed
• [Journal Article] Suppression of ferromagnetism due to hole doping in Zn1-xCrxTe grown by molecular-beam epitaxy (2005)
  • Author(s): N. Ozaki, I. Okabayashi, T. Kumekawa, N. Nishizawa, S. Kuroda, K. Takita
  • Journal Title: Appl. Phys. Lett. 87 Pages: 192116,1-3
  • Peer Reviewed
• [Presentation] 強磁場を用いた単層カーボンナノチューブの励起子状態の解明 (2009)
  • Author(s): 横井裕之
  • Organizer: 九州大学先導物質化学研究所非常勤講師講演会
  • Place of Presentation: 福岡県春日市
  • Year and Date: 2009-11-06
• [Presentation] 量子ドットー2次元電子相関係のコヒーレンス (2008)
  • Author(s): 高増正
  • Organizer: 物性科学領域横断研究会-スピンが拓く物性科学の最前線-
  • Place of Presentation: 東京都
  • Year and Date: 20081129-20080201
• [Presentation] 一次元有機導体の強磁場SDW状態 (2008)
  • Author(s): 宇治進也
  • Organizer: 物性科学領域横断研究会-スピンが拓く物性科学の最前線-
  • Place of Presentation: 東京都
  • Year and Date: 20081129-20080201
• [Presentation] Calorimetric Measurements of One-Dimensional Organic Conductor (TMTSF)2ClO4 in High Magnetic Field up to 35 T (2008)
  • Author(s): S. Uji, et al.
  • Organizer: 6th International Conference on Physical Phenomena in High Magnetic Fields (PPHMF-VI)
  • Place of Presentation: Tallinn, Estonia
  • Year and Date: 20080801-20080806
• [Presentation] Control of Nanocluster Formation and Ferromagnetic Properties in Diluted Magnetic Semiconductors (2008)
  • Author(s): S. Kuroda
  • Organizer: 29th International Conference on the Physics of Semiconductors
  • Place of Presentation: Rio de Janeiro, Brazil.
  • Year and Date: 20080727-20080801
• [Presentation] 磁性半導体における磁性元素の不均一分布と強磁性特性 (2008)
  • Author(s): 黒田眞司
  • Organizer: 日本物理学会第63回年次大会
  • Place of Presentation: 東大阪市
  • Year and Date: 20080323-20080326
• [Presentation] Two-Dimensional Exciton Complexes in High Magnetic Fields (2006)
  • Author(s): S. Takeyama
  • Organizer: International Workshop on High Magnetic Field Research "New Horizon in High Magnetic Fields"
  • Place of Presentation: Tsukuba, Japan
  • Year and Date: 20060117-20060120
• [Presentation] Cyclotron Resonance in II-VI Semiconductors at THz Region (2005)
  • Author(s): Y. Imanaka, T. Takamasu, K. Takehana, M. Oshikiri, G. Kido, H. Nojiri, Y. Matsuda, H. Arimoto, S. Takeyama, N. Miura, G. Karczewski, T. Wojtowicz, J. Kossut
  • Organizer: 12th International Conference of II-VI Compounds
  • Place of Presentation: Warsaw, Poland.
  • Year and Date: 20050911-20050916
• [Book] 粉体および粉末冶金(磁場印加中熱分解による強磁性熱分解炭素の作製, 56) (2009)
  • Author(s): 神島 謙二, 宮田 大資, 佐藤 佑樹, 徳江 将, 柿崎 浩一, 平塚 信之, 今中 康貴, 高増 正
  • Total Pages: 456-460
  • Publisher: 粉体粉末冶金協会
• [Book] 実験物理科学シリーズ5 強磁場の発生と応用(定常磁場下の電気的測定) (2008)
  • Author(s): 高増正
  • Total Pages: 255-263
  • Publisher: 共立出版
• [Book] 日本金属学会誌(有機伝電体における磁場誘起超伝導, 71) (2007)
  • Author(s): 宇治進也
  • Total Pages: 934-939
  • Publisher: 日本金属学会
• [Book] Narrow Gap Semiconductors(Magneto-optical Study of Aharonov-Bohm effect on Second Subbands in Single-walled Carbon Nanotubes) (2005)
  • Author(s): H. Yokoi, N. Kuroda, Y. Kim, S. Kazaoui, N. Minami, K. Uchida, S. Takeyama
  • Total Pages: 6
  • Publisher: Taylor & Francis
• [Remarks]
  • URL: http://www.nims.go.jp/nmp/http://takeyama.issp.u-tokyo.ac.jp/
• [Remarks] 「強磁性半導体、温度制御技術を開発、筑波大など」、日経産業新聞、2007. 5. 22、添加物制御によりCrZnTeで室温の強磁性半導体を得ることに成功
• [Remarks] 「強磁性半導体内のナノ結晶形成、不純物添加し制御、筑波大など」、日刊工業新聞、2007. 5. 23、不純物制御により強磁性半導体においてナノ組織の形成を制御することに成功
• [Remarks] 「半導体、室温でも磁性」、朝日新聞、2007. 5. 25、CrZnTe系で室温の強磁性半導体を開発