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Superconducting proximity effect on Dirac electron sytstems

Research Project

Project/Area Number 24540375
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Condensed matter physics II
Research InstitutionHiroshima University

Principal Investigator

TAKANE Yositake  広島大学, 先端物質科学研究科, 教授 (40254388)

Research Collaborator IMURA Ken-ichiro  広島大学, 大学院先端物質科学研究科, 助教 (90391870)
Project Period (FY) 2012-04-01 – 2015-03-31
Project Status Completed (Fiscal Year 2014)
Budget Amount *help
¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2013: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2012: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Keywords物性理論 / トポロジカル絶縁体 / グラフェン / 超伝導近接効果
Outline of Final Research Achievements

We have investigated the superconducting proximity effect on Dirac electrons which appear in graphene sheets and topological insulators. We have developed a general quasi-classical theory of the Josephson effect in graphene, and have derived a general effective model for Dirac electrons under the superconducting proximity effect. These theoretical frameworks enable us to accurately describe the proximity effect in Dirac electron systems beyond ordinary phenomenological models.
As the subject related to those mentioned above, we have also developed the theoretical framework to describe Dirac electrons on a surface of topological insulators.

Report

(4 results)
  • 2014 Annual Research Report   Final Research Report ( PDF )
  • 2013 Research-status Report
  • 2012 Research-status Report
  • Research Products

    (27 results)

All 2015 2014 2013 2012

All Journal Article (13 results) (of which Peer Reviewed: 13 results,  Acknowledgement Compliant: 4 results) Presentation (14 results)

  • [Journal Article] Noninvasive metallic state2015

    • Author(s)
      Ken-Ichiro Imura and Yositake Takane
    • Journal Title

      JPS Conf. Proc.

      Volume: 4

    • DOI

      10.7566/jpscp.4.013005

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Local Density of States in a Helical Tomonaga-Luttinger Liquid of Loop and Josephson Junction Geometries2014

    • Author(s)
      Yositake Takane
    • Journal Title

      J. Phys. Soc. Jpn.

      Volume: 83 Issue: 4 Pages: 044714-044714

    • DOI

      10.7566/jpsj.83.044714

    • NAID

      40020041263

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Delocalization of Surface Dirac Electrons in Disordered Weak Topological Insulators2014

    • Author(s)
      Yositake Takane
    • Journal Title

      J. Phys. Soc. Jpn.

      Volume: 83 Issue: 10 Pages: 103706-103706

    • DOI

      10.7566/jpsj.83.103706

    • NAID

      40020226135

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Effective Model for Massless Dirac Electrons on a Surface of Weak Topological Insulators2014

    • Author(s)
      Takashi Arita and Yositake Takane
    • Journal Title

      J. Phys. Soc. Jpn.

      Volume: 83 Issue: 12 Pages: 124716-124716

    • DOI

      10.7566/jpsj.83.124716

    • NAID

      40020299956

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Superconducting proximity effect on a two-dimensional Dirac electron system2014

    • Author(s)
      Y. Takane and R. Ando
    • Journal Title

      J. Phys. Soc. Jpn.

      Volume: 83 Issue: 1 Pages: 014706-014706

    • DOI

      10.7566/jpsj.83.014706

    • NAID

      40019944857

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] One-dimensional topological insulator: A model for studying finite-size effects in topological insulator thin films2014

    • Author(s)
      M. Okamoto, Y. Takane, and K.-I. Imura
    • Journal Title

      Phys. Rev. B

      Volume: 89 Issue: 12

    • DOI

      10.1103/physrevb.89.125425

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] Protection of the surface states in topological insulators: Berry phase perspective2013

    • Author(s)
      K.-I. Imura and Y. Takane
    • Journal Title

      Phys. Rev. B

      Volume: 87 Issue: 20

    • DOI

      10.1103/physrevb.87.205409

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] Unified description of Dirac electrons on a curved surface of topological insulators2013

    • Author(s)
      Y. Takane and K.-I. Imura
    • Journal Title

      J. Phys. Soc. Jpn.

      Volume: 82 Issue: 7 Pages: 074712-074712

    • DOI

      10.7566/jpsj.82.074712

    • NAID

      40019696979

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] Perfectly conducting channel on the dark surface of weak topological insulators2013

    • Author(s)
      Y. Yoshimura, A. Matsumoto, Y. Takane, and K.-I. Imura
    • Journal Title

      Phys. Rev. B

      Volume: 88 Issue: 4

    • DOI

      10.1103/physrevb.88.045408

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] Quasiclassical theory of the Josephson effect in ballistic graphene junctions2012

    • Author(s)
      Y. Takane and K.-I. Imura
    • Journal Title

      J. Phys. Soc. Jpn.

      Volume: 81 Issue: 9 Pages: 094707-094707

    • DOI

      10.1143/jpsj.81.094707

    • NAID

      40019415673

    • Related Report
      2012 Research-status Report
    • Peer Reviewed
  • [Journal Article] Dirac electrons on a sharply edged surface of topological insulators2012

    • Author(s)
      Y. Takane and K.-I. Imura
    • Journal Title

      J. Phys. Soc. Jpn.

      Volume: 81 Issue: 9 Pages: 093705-093705

    • DOI

      10.1143/jpsj.81.093705

    • NAID

      40019415315

    • Related Report
      2012 Research-status Report
    • Peer Reviewed
  • [Journal Article] Spherical topological insulator2012

    • Author(s)
      K.-I. Imura, Y. Yoshimura, Y. Takane, and T. Fukui
    • Journal Title

      Phys. Rev. B

      Volume: 86 Issue: 23

    • DOI

      10.1103/physrevb.86.235119

    • NAID

      120005222694

    • Related Report
      2012 Research-status Report
    • Peer Reviewed
  • [Journal Article] Finite-size energy gap in weak and strong topological insulators2012

    • Author(s)
      K.-I. Imura, M. Okamoto, Y. Yoshimura, Y. Takane,T. Ohtsuki
    • Journal Title

      Phys. Rev. B

      Volume: 86 Issue: 24

    • DOI

      10.1103/physrevb.86.245436

    • NAID

      120005222693

    • Related Report
      2012 Research-status Report
    • Peer Reviewed
  • [Presentation] 乱れを含む弱いトポロジカル絶縁体表面における電気伝導度2015

    • Author(s)
      高根美武
    • Organizer
      日本物理学会
    • Place of Presentation
      早稲田大学
    • Year and Date
      2015-03-21
    • Related Report
      2014 Annual Research Report
  • [Presentation] Delocalization of surface Dirac electrons in disordered weak topological insulators2014

    • Author(s)
      Yositake Takane
    • Organizer
      Int. Conf. Topological Quantum Phenomena
    • Place of Presentation
      京都大学
    • Year and Date
      2014-12-17
    • Related Report
      2014 Annual Research Report
  • [Presentation] 有限長のヘリカルTomonaga-Luttinger液体における局所状態密度2014

    • Author(s)
      高根美武
    • Organizer
      日本物理学会
    • Place of Presentation
      中部大学
    • Year and Date
      2014-09-08
    • Related Report
      2014 Annual Research Report
  • [Presentation] 弱いトポロジカル絶縁体の表面状態に対する有効2次元モデル2014

    • Author(s)
      有田貴志,高根美武
    • Organizer
      日本物理学会
    • Place of Presentation
      中部大学
    • Year and Date
      2014-09-08
    • Related Report
      2014 Annual Research Report
  • [Presentation] ヘリカル朝永-Luttinger 液体から成るジョセフソン接合における局所状態密度2014

    • Author(s)
      高根美武
    • Organizer
      第22回渦糸物理国内会議
    • Place of Presentation
      ハイランドふらの
    • Year and Date
      2014-07-10
    • Related Report
      2014 Annual Research Report
  • [Presentation] 2次元ディラック電子系に対する超伝導近接効果2014

    • Author(s)
      高根美武,安東諒
    • Organizer
      日本物理学会
    • Place of Presentation
      東海大学
    • Related Report
      2013 Research-status Report
  • [Presentation] トポロジカル絶縁体表面における自発的AB効果と表面状態の頑強性2014

    • Author(s)
      吉村幸徳,井村健一郎,高根美武
    • Organizer
      日本物理学会
    • Place of Presentation
      東海大学
    • Related Report
      2013 Research-status Report
  • [Presentation] トポロジカル絶縁体の表面電子系に対する一般化したディラック方程式2013

    • Author(s)
      高根美武,井村健一郎
    • Organizer
      日本物理学会
    • Place of Presentation
      徳島大学
    • Related Report
      2013 Research-status Report
  • [Presentation] かどで跳ね返る(vs. 跳ね返らない)Dirac電子2013

    • Author(s)
      井村健一郎,岡本真由子,吉村幸徳,高根美武
    • Organizer
      日本物理学会
    • Place of Presentation
      徳島大学
    • Related Report
      2013 Research-status Report
  • [Presentation] 弱いトポロジカル絶縁体の「暗い」表面に現れる完全伝導チャンネル2013

    • Author(s)
      吉村幸徳,松本哲彦,井村健一郎,高根美武
    • Organizer
      日本物理学会
    • Place of Presentation
      広島大学
    • Related Report
      2012 Research-status Report
  • [Presentation] しみ込め(ま)ない金属状態2013

    • Author(s)
      井村健一郎,高根美武
    • Organizer
      日本物理学会
    • Place of Presentation
      広島大学
    • Related Report
      2012 Research-status Report
  • [Presentation] 折れ曲がったトポロジカル絶縁体表面におけるディラック電子2012

    • Author(s)
      高根美武,井村健一郎
    • Organizer
      日本物理学会
    • Place of Presentation
      横浜国立大学
    • Related Report
      2012 Research-status Report
  • [Presentation] 球状トポロジカル絶縁体の表面状態2012

    • Author(s)
      井村健一郎,吉村幸徳,高根美武,福井隆裕
    • Organizer
      日本物理学会
    • Place of Presentation
      横浜国立大学
    • Related Report
      2012 Research-status Report
  • [Presentation] Noninvasive Metallic State2012

    • Author(s)
      K.-I. Imura and Y. Takane
    • Organizer
      International Symposium "Nanoscience and Quantum Physics 2012"
    • Place of Presentation
      東京工業大学
    • Related Report
      2012 Research-status Report

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

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