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Spin-polarized surface states of germanium substrate modified by surface adsorbates

Research Project

Project/Area Number 24740197
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Condensed matter physics I
Research InstitutionThe University of Tokyo

Principal Investigator

YAJI Koichiro  東京大学, 物性研究所, 助教 (50447447)

Project Period (FY) 2012-04-01 – 2014-03-31
Project Status Completed (Fiscal Year 2013)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2013: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2012: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywordsスピン軌道相互作用 / 半導体表面 / 表面電子 / 角度分解光電子分光 / スピン分解光電子分光 / 表面超構造
Research Abstract

Spin-polarized surface states of heavy-element-atoms adsorbed semiconductor substrates have been studied. A monolayer Pb adsorbed Ge(111) surface exhibits two-dimensional electronic states localized in subsurface layers of a Ge(111) substrate. In addition, the surface-state bands are split into two due to the Rashba effect. For Pt-induced nanowires formed on Ge(001) surface, we found several one-dimensional metallic bands. One of the metallic bands is accurately one-dimensional and behaves as the Fermi gas. In addition, another quasi-one-dimensional metallic band shows the Rashba-type spin splitting. These results are essential to a new scientific field such as surface spin transport, filtering and injection into semiconductors.

Report

(3 results)
  • 2013 Annual Research Report   Final Research Report ( PDF )
  • 2012 Research-status Report
  • Research Products

    (23 results)

All 2014 2013 2012 Other

All Journal Article (4 results) (of which Peer Reviewed: 3 results) Presentation (17 results) (of which Invited: 6 results) Remarks (2 results)

  • [Journal Article] Two-dimensional states localized in subsurface layers of Ge(111)2013

    • Author(s)
      Y. Ohtsubo, K. Yaji, S. Hatta, H. Okuyama, T. Aruga
    • Journal Title

      Physical Review B

      Volume: 88 Issue: 24

    • DOI

      10.1103/physrevb.88.245310

    • NAID

      120005373072

    • Related Report
      2013 Annual Research Report 2013 Final Research Report
    • Peer Reviewed
  • [Journal Article] Fermi gas behavior of a one-dimensional metallic band of Pt-induced nanowires on Ge(001)2013

    • Author(s)
      矢治光一郎、望月出海、金聖憲, 他
    • Journal Title

      Physical Review B

      Volume: Vol. 87 Issue: 24

    • DOI

      10.1103/physrevb.87.241413

    • Related Report
      2013 Annual Research Report 2013 Final Research Report
    • Peer Reviewed
  • [Journal Article] Structural and electronic properties of the Pb/Ge(111)-β(√3×√3)R30° surface studied by photoelectron spectroscopy and first-principles calculations2012

    • Author(s)
      K. Yaji, S. Hatta, H. Okuyama, T. Aruga
    • Journal Title

      Phys. Rev. B

      Volume: 86 Issue: 23 Pages: 235317-235322

    • DOI

      10.1103/physrevb.86.235317

    • Related Report
      2013 Final Research Report 2012 Research-status Report
    • Peer Reviewed
  • [Journal Article] 第4回日本放射光学会「表面電子のスピンが生み出す物理の最前線-ラシュバ効果,トポロジカル絶縁体-」報告2012

    • Author(s)
      矢治光一郎
    • Journal Title

      放射光

      Volume: 25 Pages: 351-356

    • Related Report
      2012 Research-status Report
  • [Presentation] 角度分解光電子分光によるPt/Ge(001)表面一次元原子鎖の電子状態観測2014

    • Author(s)
      矢治光一郎
    • Organizer
      日本物理学会 第69回年次大会
    • Place of Presentation
      東海大学(神奈川県)
    • Related Report
      2013 Annual Research Report
  • [Presentation] 一次元原子鎖Pt/Ge(001)のスピン偏極した擬一次元金属電子状態と構造相転移2013

    • Author(s)
      矢治光一郎, 他
    • Organizer
      日本物理学会秋季大会
    • Place of Presentation
      徳島大学
    • Year and Date
      2013-09-26
    • Related Report
      2013 Final Research Report
  • [Presentation] Electronic structure of Pt-induced nanowires on Ge(001) studied by angle-resolved photoelectron spectroscopy2013

    • Author(s)
      矢治光一郎, 他
    • Organizer
      19th International Vacuum Congress IVC-19
    • Place of Presentation
      パリ,フランス
    • Year and Date
      2013-09-12
    • Related Report
      2013 Final Research Report
  • [Presentation] Spin-polarized metallic surface-state bands on germanium surfaces2013

    • Author(s)
      矢治光一郎
    • Organizer
      Collaborative Conference on 3D & Materials Research
    • Place of Presentation
      チェジュ島,韓国
    • Year and Date
      2013-06-25
    • Related Report
      2013 Final Research Report
    • Invited
  • [Presentation] 半導体表面上でスピン分裂した金属表面状態の発見2013

    • Author(s)
      矢治光一郎
    • Organizer
      日本物理学会年次大会
    • Place of Presentation
      広島大学
    • Year and Date
      2013-03-27
    • Related Report
      2013 Final Research Report
    • Invited
  • [Presentation] 一次元原子鎖Pt/Ge(001)のスピン偏極した擬一次元金属電子状態2013

    • Author(s)
      矢治光一郎
    • Organizer
      第33回表面科学学術講演会
    • Place of Presentation
      つくば国際会議場(茨城県)
    • Related Report
      2013 Annual Research Report
  • [Presentation] 一次元原子鎖Pt/Ge(001)のスピン偏極した擬一次元金属電子状態と構造相転移2013

    • Author(s)
      矢治光一郎
    • Organizer
      日本物理学会 秋季大会
    • Place of Presentation
      徳島大学(徳島県)
    • Related Report
      2013 Annual Research Report
  • [Presentation] Electronic structure of Pt-induced nanowires on Ge(001) studied by angle-resolved photoelectron spectroscopy2013

    • Author(s)
      Koichiro Yaji
    • Organizer
      19th International Vacuum Congress IVC-19
    • Place of Presentation
      フランス パリ
    • Related Report
      2013 Annual Research Report
  • [Presentation] 半導体表面に形成された一次元鎖の金属的電子状態2013

    • Author(s)
      矢治光一郎
    • Organizer
      SPring-8 シンポジウム2013サテライト研究会 表面界面・薄膜ナノ構造研究会
    • Place of Presentation
      京都大学(京都府)
    • Related Report
      2013 Annual Research Report
    • Invited
  • [Presentation] Spin-polarized metallic surface-state bands on germanium surfaces2013

    • Author(s)
      Koichiro Yaji
    • Organizer
      Collaborative Conference on 3D & Materials Research
    • Place of Presentation
      韓国 チェジュ島
    • Related Report
      2013 Annual Research Report
    • Invited
  • [Presentation] Pt/Ge(001)表面の一次元金属的な電子状態2013

    • Author(s)
      矢治光一郎
    • Organizer
      日本物理学会
    • Place of Presentation
      広島大学
    • Related Report
      2012 Research-status Report
  • [Presentation] 半導体上でスピン分裂した金属表面状態の発見2013

    • Author(s)
      矢治光一郎
    • Organizer
      日本物理学会
    • Place of Presentation
      広島大学
    • Related Report
      2012 Research-status Report
    • Invited
  • [Presentation] Spin-polarized metallic surface-state bands on germanium surfaces2013

    • Author(s)
      Koichiro Yaji
    • Organizer
      Collaborative Conference on 3D & Materials Research
    • Place of Presentation
      Jeju, Korea
    • Related Report
      2012 Research-status Report
    • Invited
  • [Presentation] Electronic structure of Pt-induced nanowires on Ge(001) studied by angle-resolved photoelectron spectroscopy2013

    • Author(s)
      Koichiro Yaji
    • Organizer
      19th International Vacuum Congress
    • Place of Presentation
      Paris, France
    • Related Report
      2012 Research-status Report
  • [Presentation] 半導体表面上でスピン偏極した金属的表面電子状態2012

    • Author(s)
      矢治光一郎
    • Organizer
      日本放射光若手研究会
    • Place of Presentation
      東京大学
    • Related Report
      2012 Research-status Report
  • [Presentation] Direct observation of one-dimensional metallic bands of Pt-induced nanowires on Ge(001) by angle-resolved photoelectron spectroscopy2012

    • Author(s)
      Koichiro Yaji
    • Organizer
      The 12th International Conference on Electron Spectroscopy and Structure
    • Place of Presentation
      Saint-Malo, France
    • Related Report
      2012 Research-status Report
  • [Presentation] 角度分解光電子分光によるPt/Ge(001)表面の一次元金属的な電子状態の直接観測2012

    • Author(s)
      矢治光一郎
    • Organizer
      表面科学学術講演大会
    • Place of Presentation
      東北大学
    • Related Report
      2012 Research-status Report
  • [Remarks] 低温でも安定な一次元フェルミ面

    • URL

      http://www.synchrotron-soleil.fr/Soleil/ToutesActualites/2013/CASSIOPEE-PRB-Fermi-Nanofils

    • Related Report
      2013 Annual Research Report
  • [Remarks] 東京大学物性研究所【物性研ニュース】

    • URL

      http://www.issp.u-tokyo.ac.jp/cgi-bin/n1004_detail.cgi?c=information_table::317

    • Related Report
      2012 Research-status Report

URL: 

Published: 2013-05-31   Modified: 2020-05-15  

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