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2008 Fiscal Year Final Research Report

Potential fluctuation and the domain structure of electronic state in two-dimensional electron systems investigated by the quantum Hall effect

Research Project

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Project/Area Number 19540330
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Condensed matter physics I
Research InstitutionChiba University

Principal Investigator

OTO Kenichi  Chiba University, 大学院・理学研究科, 准教授 (30263198)

Research Collaborator MURO Kiyofumi  千葉大学, 大学院・理学研究科, 教授 (90112028)
Project Period (FY) 2007 – 2008
Keywords量子ホール効果 / ポテンシャル揺らぎ / 2次元電子系 / 電子スピン分極 / 電流分布 / Kerr効果 / イメージング
Research Abstract

GaAs/AlGaAs量子井戸2次元電子系を対象に低温・強磁場の下で微弱励起光による磁気光カー回転を用いて2次元電子系1層の電子スピン偏極度のイメージングを行った。試料の0.1%以下の僅かな電子濃度の空間ゆらぎにより、スピン偏極度が分布を持つことが明瞭に可視化された。また、電流によるホール効果で生じた極めて僅かな電子分布の変化がスピン偏極度に反映し量子ホール電流のイメージングが可能であることを実証した。

  • Research Products

    (12 results)

All 2009 2008 2007 Other

All Journal Article (4 results) (of which Peer Reviewed: 4 results) Presentation (8 results)

  • [Journal Article] Transport properties and observation of quantum Hall effects of InAs_<0.1>Sb_<0.9> thin layers sandwiched between Al_<0.1>In_<0.1>Sb layers2009

    • Author(s)
      I. Shibasaki, H. Geka, S. Ishida, K. Oto, T. Ishihara, and T. Yoshida
    • Journal Title

      Microelectronics Journal 40

      Pages: 592-594

    • Peer Reviewed
  • [Journal Article] Spin dynamics of two-dimensional electrons in a quantum Hall system probed by time-resolved Kerr rotation spectro-scopy2008

    • Author(s)
      D. Fukuoka, T. Yamazaki, N. Tanaka, K. Oto, K. Muro, Y. Hirayama, N. Kumada, and H. Yamaguchi
    • Journal Title

      Phys. Rev B78, 041304(R)

      Pages: 1-4

    • Peer Reviewed
  • [Journal Article] Potential imaging in quantum Hall device by optical fiber based Pockels measurement2007

    • Author(s)
      M.Dohi, R.Yonamine, K. Oto, and K.Muro
    • Journal Title

      Int. J. of Modern Phys. B21

      Pages: 1414-1418

    • Peer Reviewed
  • [Journal Article] Electron spin imaging in quantum Hall devices by Kerr rotation measurement

    • Author(s)
      K. Oto, R. Inaba, T. Yamada, T. Yamazaki, K. Muro, Y. Hirayama, N. Kumada, and H. Yamaguchi
    • Journal Title

      Int. J. of Modern Phys. B (in press)

    • Peer Reviewed
  • [Presentation] 電子スピン分極イメージングによる量子ホールデバイス中の電流分布測定2009

    • Author(s)
      山田哲也
    • Organizer
      日本物理学会第64回年次大会
    • Place of Presentation
      立教大学池袋キャンパス(東京都)
    • Year and Date
      2009-03-28
  • [Presentation] 量子ホール2次元電子系のスピンイメージング2008

    • Author(s)
      音賢一
    • Organizer
      6特定領域合同研究会「スピンが開く物性科学の最前線」
    • Place of Presentation
      東京大学武田ホール(東京都)
    • Year and Date
      2008-11-29
  • [Presentation] Electron spin imaging in current flowing quantum Hall devices2008

    • Author(s)
      K. Oto
    • Organizer
      13th Advanced Heterostructures and Nano- structures Workshop
    • Place of Presentation
      Big Island of Hawaii, USA.
    • Year and Date
      2008-10-10
  • [Presentation] Electron spin imaging in quantum Hall devices by Kerr rotation measurement2008

    • Author(s)
      K. Oto
    • Organizer
      18th Int. Conf. on High Magnetic Fields in Semicond. Phys
    • Place of Presentation
      Sao Paulo, Brazil
    • Year and Date
      2008-08-06
  • [Presentation] Optical Imaging of Quantum Hall Current in GaAs/AlGaAs Two Dimensional Electron System2008

    • Author(s)
      K. Oto
    • Organizer
      29th Int. Conf. Phys. of Semiconductors(ICPS 2008)
    • Place of Presentation
      Rio de Janeiro, Brazil
    • Year and Date
      2008-07-29
  • [Presentation] 電気光学イメージングでみた量子ホールブレークダウン2008

    • Author(s)
      金子志行
    • Organizer
      日本物理学会第63回年次大会
    • Place of Presentation
      近畿大学本部キャンパス
    • Year and Date
      2008-03-23
  • [Presentation] Imaging of Quantum Hall Current in High Magnetic field2007

    • Author(s)
      K. Oto
    • Organizer
      4th International Symposium on High Magnetic Field Spin Science in 100T
    • Place of Presentation
      Tohoku University, Sendai, Japan
    • Year and Date
      2007-11-27
  • [Presentation] Imaging of Quantum Hall Current in GaAs/AlGaAs Two-dimensional Electron System2007

    • Author(s)
      K. Oto
    • Organizer
      5th International Workshop "Quantum Transport in Nanoscale Devices"
    • Place of Presentation
      Chiba University, Chiba, Japan
    • Year and Date
      2007-10-20

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Published: 2010-06-10   Modified: 2016-04-21  

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