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Time- and angle-resolved photoemission study of high-Tc cuprates

Research Project

Project/Area Number 23740256
Research Category

Grant-in-Aid for Young Scientists (B)

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

Principal Investigator

ISHIDA Yukiaki  東京大学, 物性研究所, 助教 (30442924)

Project Period (FY) 2011 – 2012
Project Status Completed (Fiscal Year 2012)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2012: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2011: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Keywords超高速現象 / 高温超伝導体 / 光電子分光 / 超短パルスレーザー / トポロジカル絶 縁体 / 表面光電効果 / 非線形光学過程 / トポロジカル絶縁体 / 強相関電子系
Research Abstract

A high-Tc copper-oxide superconductor is investigated by means of time- and angle-resolved photoemission spectroscopy. We observe that the transient changes in the spectra occur only below a characteristic kink binding energy, and that the superconducting gap is transiently filled in the momentum region near the gap node. The results indicate that the scattering rate between the quasiparticle-excitations and the boson mode relevant for the kink is transiently increased so that the spectral weight is redistributed near the node and fills the superconducting gap in the nodal region. We also find a phenomenon wherein the efficiency of photoemission is modified when the surface is driven into non-equilibrium. This observation provides insights into the mechanism of photoemission from surface.

Report

(3 results)
  • 2012 Annual Research Report   Final Research Report ( PDF )
  • 2011 Research-status Report
  • Research Products

    (11 results)

All 2013 2012 2011

All Journal Article (5 results) (of which Peer Reviewed: 5 results) Presentation (6 results)

  • [Journal Article] Access to hole dynamics in graphite by femtosecond luminescence and photoemission spectroscopy2013

    • Author(s)
      Tohru Suemoto, Shigeyuki Sakaki, Makoto Nakajima, Yukiaki Ishida, and Shik Shin
    • Journal Title

      Phys. Rev. B

      Volume: 87 Issue: 22 Pages: 224302-224302

    • DOI

      10.1103/physrevb.87.224302

    • Related Report
      2012 Final Research Report
    • Peer Reviewed
  • [Journal Article] Anomalous Doping Variation of the Nodal Low-Energy Feature of Superconducting (Bi,Pb)_2(Sr,La)_2 CuO_6+d Crystals Revealed by Laser-Based Angle Resolved Photoemission Spectroscopy2013

    • Author(s)
      T. Kondo, Y. Nakashima, W.Malaeb, Y. Ishida, Y. Hamaya, T. Takeuchi,S. Shin
    • Journal Title

      Physical Review Letters

      Volume: 110 Pages: 217006-217006

    • Related Report
      2012 Final Research Report
    • Peer Reviewed
  • [Journal Article] Anomalous Dressing of Dirac Fermions in the Topological Surface State of Bi_2Se_3, Bi_2Te_3, and Cu-Doped Bi_2Se_32013

    • Author(s)
      T. Kondo, Y. Nakashima, Y. Ota,Y. Ishida, W. Malaeb, K.Okazaki,S.Shin
    • Journal Title

      Physical Review Letters

      Volume: 110 Issue: 21 Pages: 217601-217601

    • DOI

      10.1103/physrevlett.110.217601

    • Related Report
      2012 Final Research Report
    • Peer Reviewed
  • [Journal Article] Non-thermal hot electrons ultrafastly generating hot optical phonons in graphite2011

    • Author(s)
      Y. Ishida, T. Togashi, K. Yamamoto, M. Tanaka, T. Taniuchi, T.Kiss, M. Nakajima, T. Suemoto, S. Shin
    • Journal Title

      Scientific Reports

      Volume: 1 Pages: 64-64

    • Related Report
      2012 Final Research Report
    • Peer Reviewed
  • [Journal Article] Non-thermal hot electrons ultrafastly generating hot optical phonons in graphite2011

    • Author(s)
      Y.Ishida, T.Togashi, K.Yamamoto, M.Tanaka, T.Taniuchi, T.Kiss, M.Nakajima, T.Suemoto, S.Shin
    • Journal Title

      Sci.Rep.

      Volume: 1 Issue: 1 Pages: 64-64

    • DOI

      10.1038/srep00064

    • Related Report
      2011 Research-status Report
    • Peer Reviewed
  • [Presentation] Transient Surface Photoemission Involving Nonlinear Surface Sheet Polarization Developed on the Doped Bi_2Se_3 Topological Insulator2013

    • Author(s)
      Y. Ishida,H. Kanto, W. Malaeb, S. Watanabe, C.-T.Chen, A. Kikkawa, Y. Taguchi, Y. Tokura,S. Shin
    • Organizer
      APS March Meeting 2013
    • Place of Presentation
      Baltimore Convention Center,Maryland, USA.
    • Related Report
      2012 Final Research Report
  • [Presentation] Transient Surface Photoemission Involving Nonlinear Surface Sheet Polarization Developed on the Doped Bi2Se3 Topological Insulator2013

    • Author(s)
      Yukiaki Ishida
    • Organizer
      APS March Meeting 2013
    • Place of Presentation
      Baltimore Convention Center, Maryland, USA
    • Related Report
      2012 Annual Research Report
  • [Presentation] ドープしたBi_2Se_3の表面分極を介した超高速非線形光電子放出2012

    • Author(s)
      石田行章, 菅藤裕昭 , Walid Malaeb, 渡部俊太郎 , Chuangtian Chen, 吉川明子, 田口康二郎, 十倉好紀, 辛埴
    • Organizer
      日本物理学会秋季大会
    • Place of Presentation
      横浜国立大学
    • Year and Date
      2012-09-18
    • Related Report
      2012 Final Research Report
  • [Presentation] Time-resolved ARPES of graphite using deep-to-extreme UV lasers2012

    • Author(s)
      Y. Ishida
    • Organizer
      JAEA Symposium on Synchrotron Radiation Research
    • Place of Presentation
      兵庫県
    • Year and Date
      2012-03-07
    • Related Report
      2012 Final Research Report
  • [Presentation] ドープしたBi2Se3の表面分極を介した超高速非線形光電子放出2012

    • Author(s)
      石田行章
    • Organizer
      日本物理学会「秋季大会」
    • Place of Presentation
      横浜国立大学
    • Related Report
      2012 Annual Research Report
  • [Presentation] Time-resolved ARPES of graphite using deep-to-extreme UV lasers2012

    • Author(s)
      Y. Ishida
    • Organizer
      JAEA Symposium on Synchrotron Radiation Research(招待講演)
    • Place of Presentation
      兵庫県
    • Related Report
      2011 Research-status Report

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Published: 2011-08-05   Modified: 2020-05-15  

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