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2012 Fiscal Year Final Research Report

Quasi-particle interference in a spin-split surface band and its application to spin filters

Research Project

  • PDF
Project/Area Number 22360019
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Thin film/Surface and interfacial physical properties
Research InstitutionTokyo Institute of Technology

Principal Investigator

HIRAYAMA Hiroyuki  東京工業大学, 大学院・総合理工学研究科, 教授 (60271582)

Co-Investigator(Kenkyū-buntansha) AOKI Yuki  東京工業大学, 大学院・総合理工学研究科, 助教 (60514271)
Project Period (FY) 2010 – 2012
Keywords表面
Research Abstract

We investigated electronic states of the Bi/Ag(111)√3x√3 surfaces using STM-based dI/dV imaging and STS spectrum measurements. The surface states were confirmed to be spin-splitted by observing a characteristic peak in STS. The spin-splitted surface band electrons were suffered intra-band scattering at surface steps to induced quasi-particle interference (i.e. surface electron standing wave pattern in dI/dV images). The energu dependence of the wavelength of the interference pattern enabled us to deduce the averaged surface band dispersion of the paired spin-splitted surface bands. In addition, we found a novel surface reconstruction of Bi/Ag(111) surface at a higher Bi coverage, surfactant effect of Bi on the Ag growth on the Bi/Ag(111)√3x√3 surfaces, and a relation between the randomly adsorbed Bi atoms and the life time of the surface state electrons.

  • Research Products

    (18 results)

All 2013 2012 2011 2010 Other

All Journal Article (5 results) (of which Peer Reviewed: 5 results) Presentation (12 results) Remarks (1 results)

  • [Journal Article] Initial stage of Ag growth on Bi/Ag(111)√3x√3 surfaces2013

    • Author(s)
      H. Fukumnoto, M.Miyzaki,Y. Aoki,K.Nakatsuji and H. Hirayama
    • Journal Title

      Surface Science

      Volume: 611 Pages: 49-53

    • DOI

      10.1016/j.susc.2013.01.013

    • Peer Reviewed
  • [Journal Article] 【最新表面科学講座】 固体表面の電子状態2012

    • Author(s)
      平山博之、中辻寛
    • Journal Title

      色材協会誌

      Volume: Vol.85 Pages: 25-32

    • URL

      http://www.shikizai.org/Journal/backnumber/vol85/10/427_434.pdf

    • Peer Reviewed
  • [Journal Article] Decay of Shockley surface state by randomly adsorbed Bi atoms at Ag(111) surfaces2012

    • Author(s)
      H. Fukumnoto, Y. Aoki, and H. Hirayama
    • Journal Title

      Physcal Review B

      Volume: 86 Pages: 165311(1)-(5)

    • DOI

      10.1103/PhysRevB.86.165311

    • Peer Reviewed
  • [Journal Article] Quantum Interference of Rashba-typeSpin-split Surface State Electrons Physical2011

    • Author(s)
      H. Hirayama, Y. Aoki, C. Kato
    • Journal Title

      Review Letters

      Volume: 107 Pages: 0277204(1)-(4)

    • DOI

      10.1103/PhysRevLett.107.027204

    • Peer Reviewed
  • [Journal Article] Scanning Tunneling Microscope of Bi-induced Ag(111) Surface Structures2010

    • Author(s)
      C.Kato,Y.Aoki, and H.Hirayama
    • Journal Title

      Physical Review B

      Volume: 82 Pages: 165407(1)-(7)

    • DOI

      10.1103/PhysRevB.82.165407

    • Peer Reviewed
  • [Presentation] 走査トンネル顕微鏡によるAg/Si(111)√3x√3-B界面構造の観察2013

    • Author(s)
      福元博之、吉池雄作、青木悠樹、中辻寛、平山博之
    • Organizer
      日本物理学会第68回年次大会
    • Place of Presentation
      広島大学
    • Year and Date
      20130326-29
  • [Presentation] Bi/Ag(111)√3×√3表面上のAg成長2012

    • Author(s)
      福元博之、宮崎優、青木悠樹、中辻寛、平山博之
    • Organizer
      日本物理学会2012年秋季大会
    • Place of Presentation
      横浜国大
    • Year and Date
      20120918-21
  • [Presentation] Bi吸着に伴うAg(111)表面電子状態の変化2012

    • Author(s)
      福元博之、青木悠樹、平山博之
    • Organizer
      第67回日本物理学会年次大会
    • Year and Date
      20120324-27
  • [Presentation] Quantum interference ofRashba-type spin split surface stateelectrons2012

    • Author(s)
      H.Hirayama
    • Organizer
      EPFL-Titech Joint Symposium, Hakone
    • Place of Presentation
      Japan
    • Year and Date
      20120130-0203
  • [Presentation] Bi-induced changein surface state dispersion toward the Rashba spin-split upward parabolas at Ag(111) surfaces2011

    • Author(s)
      Hiroyuki Fukumoto, Yuki Aoki& Hiroyuki Hirayama
    • Organizer
      The 6th International Symposium on Surface Science (ISSS6)
    • Place of Presentation
      Tokyo, Japan
    • Year and Date
      20111211-15
  • [Presentation] Quantum interference of Rashba-Type Spin-Split Surface State Electrons2011

    • Author(s)
      Hiroyuki Hirayama, Yuki Aoki, & Chiaki Kato
    • Organizer
      The 6th International Symposium on Surface Science (ISSS6)
    • Place of Presentation
      Tokyo, Japan
    • Year and Date
      20111211-15
  • [Presentation] ラシュバ分裂した表面準位電子の量子干渉(II)2011

    • Author(s)
      平山博之、青木悠樹、加藤千明
    • Organizer
      日本物理学会2011年秋季大会
    • Place of Presentation
      富山大学
    • Year and Date
      20110921-24
  • [Presentation] Quantum interference ofRashba-Type Spin-Split Surface StateElectrons2011

    • Author(s)
      Hiroyuki Hirayama, Yuki Aoki,&Chiaki Kato
    • Organizer
      The 28th European Conference on Surface Sciece (ECOSS28)
    • Place of Presentation
      Wroclaw, Poland
    • Year and Date
      20110828-0902
  • [Presentation] ラシュバ分裂した表面準位電子の量子干渉2011

    • Author(s)
      平山博之、石原充祥、青木悠樹、加藤千明
    • Organizer
      日本物理学会第66回年次大会
    • Place of Presentation
      新潟大学
    • Year and Date
      20110325-28
  • [Presentation] Surface structure andelectronic states of ultra-thin Ag(111)films on Si(111)7x7 ubstrates2010

    • Author(s)
      H.Hirayama
    • Organizer
      The 9th Russia-Japan Seminar on Semi conductor Surfaces
    • Place of Presentation
      Vla divostok, Russia
    • Year and Date
      20100926-30
  • [Presentation] Si(111)基板上にエピタキシャル成長したAg超薄膜表面上のBi原子吸着構造2010

    • Author(s)
      加藤千明、青木悠樹、平山博之
    • Organizer
      日本物理学会第65回年次大会
    • Place of Presentation
      大阪府立大学
    • Year and Date
      2010-09-25
  • [Presentation] Ag(111)表面上のBi吸着ストライプ構造2010

    • Author(s)
      加藤千明、青木悠樹、平山博之
    • Organizer
      第71回応用物理学学術講演会
    • Place of Presentation
      長崎大学
    • Year and Date
      2010-09-17
  • [Remarks]

    • URL

      http://www.materia.titech.ac.jp/~hirayama/2009hirayamalabHP/

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Published: 2014-08-29  

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