Photo irradiation effect on transition metal oxide thin films

2010 Fiscal Year Final Research Report

• Project/Area Number: 21740274
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Condensed matter physics II
• Research Institution: Osaka University
• Principal Investigator: WAKABAYASHI Yusuke Osaka University, 大学院・基礎工学研究科, 准教授 (40334205)
• Project Period (FY): 2009 – 2010
• Keywords: 強相関電子系 / 光誘起相転移 / 遷移金属酸化物 / 薄膜 / 表面構造解析

Research Abstract

The atomic scale structures of manganese oxide thin films have been studied by means of synchrotron x-ray diffraction. While the main target of our study was the film exhibiting a photo-induced metal-insulator switching, the sample was too unstable to obtain reliable results. Instead, the technique of the structure determination of film system was improved and the difference in metallic and insulating films has been clarified.

Research Products

• [Journal Article] 有機トランジスタ材料ルブレンの伝導層における分子構造 (2011)
  • Author(s): 若林裕助
  • Journal Title: 放射光 24 Pages: 19
• [Journal Article] Sub-A resolution electron density analysis of the surface of the organic rubrene crystals (2010)
  • Author(s): Y.Wakabayashi, J.Takeya, T.Kimura
  • Journal Title: Phys.Rev.Lett. 104 Pages: 066103
• [Journal Article] Little volume change in orbital ordering transition in manganite thin films (2010)
  • Author(s): Y.Wakabayashi, H.Sawa, N.Takubo, M.Nakamura, Y.Ogimoto, K.Miyano
  • Journal Title: Journal of Physics : Conference Series 211 Pages: 012004
• [Journal Article] Size of Orbital Ordering Domain Controlled by the Itinerancy of the 3d Electrons in a Manganite Thin Film (2009)
  • Author(s): Y.Wakabayashi, H.Sagayama, T.Arima, M.Nakamura, Y.Ogimoto, Y.Kubo, K.Miyano, H.Sawa
  • Journal Title: Phys.Rev.B 79 Pages: 22040(R)
• [Journal Article] Interface structure of the rubrene crystal field effect transistor
  • Author(s): Y.Wakabayashi, J.Takeya, T.Kimura
  • Journal Title: Journal of Applied Physics : Conference Series (in press.)
• [Presentation] Structure analysis of LaAlO3/SrTiO3 interfaces (2011)
  • Author(s): Y.Wakabayashi, 他7名
  • Organizer: International Conference on Frustration in Condensed Matter
  • Place of Presentation: 仙台国際センター
  • Year and Date: 2011-01-11
• [Presentation] CTR散乱ホログラフィによる物性研究 (2010)
  • Author(s): 若林裕助
  • Organizer: 第4回埋もれた界面のX線中性子解析研究会(招待講演)
  • Place of Presentation: 物質材料研究機構(つくば)
  • Year and Date: 2010-11-30
• [Presentation] Near Surface Electron Density Analysis of an Organic Semiconductor Rubrene (2010)
  • Author(s): Y.Wakabayashi, 他2名
  • Organizer: 11th international conference on surface x-ray and neutron scattering
  • Place of Presentation: Northwestern Univ., USA
  • Year and Date: 2010-07-16
• [Presentation] Interfacial structure of a superlattice of strongly correlated manganite (2010)
  • Author(s): Y.Yamasaki, Y.Wakabayashi, 他6名
  • Organizer: 11th international conference on surface x-ray and neutron scattering
  • Place of Presentation: Northwestern Univ., USA
  • Year and Date: 2010-07-16
• [Presentation] Near Surface Structure of Organic Semiconductor Rubrene Single Crystal (2010)
  • Author(s): Y.Wakabayashi, 他2名
  • Organizer: International Conference on Science and Technology of Synthetic Metals 2010
  • Place of Presentation: Kyoto International Conference Center
  • Year and Date: 2010-07-08
• [Presentation] Interface structure of Mn-oxides film observed by surface x-ray diffraction technique (2010)
  • Author(s): Y.Yamasaki, Y.Wakabayashi, 他6名
  • Organizer: International Conference on Core Research and Engineering Science of Advanced Materials
  • Place of Presentation: 大阪大学
  • Year and Date: 2010-06-02
• [Presentation] Electron density analysis of the surface of rubrene single crystals (2010)
  • Author(s): Y.Wakabayashi, 他2名
  • Organizer: International Symposium on Organic Transistors and Functional Interfaces
  • Place of Presentation: Les Diablerets, Switzerland
  • Year and Date: 2010-05-07
• [Presentation] 表面X線散乱法によるsub-Å分解能表面構造解析 (2010)
  • Author(s): 若林裕助
  • Organizer: 日本物理学会(招待講演)
  • Place of Presentation: 岡山大学
  • Year and Date: 2010-03-20
• [Presentation] X線回折法による酸化物薄膜の三次元構造観測 (2010)
  • Author(s): 若林裕助
  • Organizer: 応用物理学会(招待講演)
  • Place of Presentation: 東海大学
  • Year and Date: 2010-03-19
• [Presentation] Orbital ordering at surfaces of manganites (2009)
  • Author(s): 若林裕助
  • Organizer: Polarized Neutrons and Synchrotron X-rays for Magnetism 2009(招待講演)
  • Place of Presentation: Gustav-Stresemann-Institut,ボン(ドイツ)
  • Year and Date: 2009-08-05
• [Remarks] ホームページ等
  • URL: http://www.crystal.mp.es.osaka-u.ac.jp/waka/research/rubrene/index.html
• [Remarks]
  • URL: http://www.kek.jp/newskek/2010/janfeb/Rubrene.html
• [Remarks] Journal of X-ray Spectrometry, News, 39, 251, (2010).
• [Remarks] 科学新聞2010年3月12日
• [Remarks] 日経産業新聞2010年2月9日
• [Remarks] 日刊工業新聞2010年1月29日