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Evaluation of transport property and electronic structure using single crystals of newly discovered layered BiS2-based superconductors

Research Project

Project/Area Number 15K17710
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Condensed matter physics II
Research InstitutionTokyo University of Science

Principal Investigator

demura Satoshi  東京理科大学, 理学部第一部物理学科, 助教 (90734939)

Project Period (FY) 2015-04-01 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2015: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywords超伝導 / BiS2系超伝導体 / 輸送特性評価 / STM測定 / 元素置換効果 / BiS2系超伝導 / 単結晶育成 / STM
Outline of Final Research Achievements

In order to clarify a superconducting mechanism of layered BiS2-based superconductors discovered in 2012, an evaluation of a transport property and an electronic structure observed by STM measurements using single crystals were performed. As a result, we succeeded in an observation of unique ordering structures appearing on the surface of single crystals of CeO0.3F0.7BiS2 and LaO0.5F0.5BiSe2. We also found that the superconducting properties were enhanced by partially substituting Bi for Pb in the conduction layer. These findings are expected to be a clue to elucidate the superconducting mechanism on BiS2-based superconductors.

Report

(3 results)
  • 2016 Annual Research Report   Final Research Report ( PDF )
  • 2015 Research-status Report
  • Research Products

    (16 results)

All 2017 2016 2015

All Journal Article (6 results) (of which Peer Reviewed: 6 results,  Acknowledgement Compliant: 4 results,  Open Access: 2 results) Presentation (10 results) (of which Int'l Joint Research: 7 results,  Invited: 1 results)

  • [Journal Article] Evaluation of Bi defect concentration in LnO1-xFxBiCh2 by scanning tunneling microscopy2017

    • Author(s)
      S. Demura, N. Ishida, Y. Fujisawa and H. Sakata
    • Journal Title

      Physics Procedia

      Volume: 印刷中

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Evolution of Superconductivity and magnetism in BiS2-based layered compounds2016

    • Author(s)
      S. Demura
    • Journal Title

      Nov. Supercond. Mat.

      Volume: 2 Issue: 1 Pages: 2299-3193

    • DOI

      10.1515/nsm-2016-0001

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Change of the Surface Structure by F Doping in BiS2-Based Superconductor CeO1-xFxBiS22016

    • Author(s)
      S. Demura, Y. Fujisawa, T. Machida, M. Nagao, Y. Takano and H. Sakata
    • Journal Title

      Physics Procedia

      Volume: 81 Pages: 49-52

    • DOI

      10.1016/j.phpro.2016.04.021

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Evolution of superconductivity and magnetism in BiS2-based layered compounds2016

    • Author(s)
      S. Demura
    • Journal Title

      Novel Superconding Materials

      Volume: 印刷中

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Change of the surface structure by F doping in BiS2-based superconductor CeO1-xFxBiS22016

    • Author(s)
      S. Demura, Y. Fujisawa, T. Machida, M. Nagao, Y. Takano, and H. Sakata
    • Journal Title

      Phys. Proc.

      Volume: 印刷中

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Enhancement of Tc in BiS2-based superconductors NdO0.7F0.3BiS2 by substitution of Pb for Bi2015

    • Author(s)
      S. Demura, Y. Fujisawa, S. Otsuki, R. Ishio, Y. Takano, and H. Sakata
    • Journal Title

      Solid State Commun.

      Volume: 223 Pages: 40-44

    • DOI

      10.1016/j.ssc.2015.09.002

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] Evaluation of Bi Defects in BiS2-based superconductors by Scanning Tunneling Microscopy and Spectroscopy2016

    • Author(s)
      S. Demura, N. Ishida, Y. Fujisawa and H. Sakata
    • Organizer
      Spectroscopies in Novel Superconductors
    • Place of Presentation
      Stuttgart (Germany)
    • Year and Date
      2016-06-19
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] LaO1-xFxBiCh2(Ch=S, Se)の走査トンネル顕微鏡/分光測定2016

    • Author(s)
      出村郷志, 藤澤唯太, 石田直樹, 冨安悠人, 坂井優斗, 小野寺崇文, 坂田英明
    • Organizer
      日本物理学会第71回年次大会
    • Place of Presentation
      東北学院大学(宮城県仙台市)
    • Year and Date
      2016-03-19
    • Related Report
      2015 Research-status Report
  • [Presentation] Ln(O,F)BiS2 (Ln=Nd, La)のSb置換による化学圧力効果2016

    • Author(s)
      大槻恵史, 出村郷志, 坂井優斗, 藤澤唯太, 坂田英明
    • Organizer
      日本物理学会第71回年次大会
    • Place of Presentation
      東北学院大学(宮城県仙台市)
    • Year and Date
      2016-03-19
    • Related Report
      2015 Research-status Report
  • [Presentation] Observation of surface and electronic structure in La(O,F)BiSe2 by scanning tunneling microscopy/spectroscopy2016

    • Author(s)
      S. Demura, N. Ishida, Y. Fujisawa and H. Sakata
    • Organizer
      International Workshop on Superconductivity and Related Functional Materials
    • Place of Presentation
      研究開発法人物質・材料研究機構 千限地区
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Evaluation of Bi Defect concentration in LnO1-xFxBiCh2 by Scanning Tunneling Microscopy2016

    • Author(s)
      S. Demura, N. Ishida, Y. Fujisawa and H. Sakata
    • Organizer
      29th International Superconductivity Symposium 2016
    • Place of Presentation
      東京フォーラム(東京都千代田区)
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Effect of partial substitution in BiS2-based superconductors2016

    • Author(s)
      S. Demura
    • Organizer
      Energy Materials and Nanotechnology on the Collaborative Conference on Crystal Growth 2016
    • Place of Presentation
      San Sebastian(Spain)
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Surface Structure of Bis2-Based Superconductor CeO1-xFxBiS2 Observed by Scanning Tunneling Microscopy2015

    • Author(s)
      S. Demura, Y. Fujisawa, T. Machida, M. Nagao, H. Sakata
    • Organizer
      International Symposium on Superconductivity
    • Place of Presentation
      船堀タワーホール(東京都江戸川区)
    • Year and Date
      2015-11-16
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] Sb-Substitution Effect on LaO0.7F0.3BiS2 Superconductor2015

    • Author(s)
      S. Otsuki, Y. Sakai, T. Onodera, S. Demura, Y. Fujisawa, H. Sakata
    • Organizer
      International Symposium on Superconductivity
    • Place of Presentation
      船堀タワーホール(東京都江戸川区)
    • Year and Date
      2015-11-16
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] Sb置換によるNdO0.7 F0.3 BiS2超伝導体の化学圧力効果2015

    • Author(s)
      大槻恵史, 出村郷志, 坂田英明
    • Organizer
      日本物理学会2015年秋季大会
    • Place of Presentation
      大阪市立大(大阪府大阪市)
    • Year and Date
      2015-09-16
    • Related Report
      2015 Research-status Report
  • [Presentation] Surface structure of BiS2-based superconductor CeO1-xFxBiS2 observed by scanning tunneling microscopy2015

    • Author(s)
      S. Demura, Y. Fujisawa, T. Machida, M. Nagao, H. Sakata
    • Organizer
      Materials and Mechanism on Superconductivity
    • Place of Presentation
      Geneva(Switzerland)
    • Year and Date
      2015-08-23
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research

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Published: 2015-04-16   Modified: 2020-05-15  

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