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Elsidation of mechanism for supermodulation and superconductivity in BiCh2 compounds by bulk/nano measurements

Research Project

Project/Area Number 18K13505
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 13030:Magnetism, superconductivity and strongly correlated systems-related
Research InstitutionNihon University

Principal Investigator

DEMURA Satoshi  日本大学, 理工学部, 助手 (90734939)

Project Period (FY) 2018-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2019: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2018: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Keywords超伝導 / BiCh2系超伝導 / 走査型トンネル顕微鏡 / 電荷密度波 / 超伝導ギャップ / 磁束量子 / BiCh2系超伝導体 / STM / 元素置換効果 / STM測定
Outline of Final Research Achievements

In this research, we investigated a relationship between superconductivity and supermodulation observed in BiCh2(Ch=S,Se) compounds and try to reveal mechanism of these phenomenon.At first,supermodulation was successfully observed in surface of LaO1-xFxBiSe2 (x=0.1) by scanning tunneling microscopy and spectroscopy (STM/STS) observation. This structure has similar features in previous STM/STS results for a sample with x=0.5. This result suggests that the mechanism of this structure is not explained by Peierls scenario.Furthermore,partial Sn substitution to LaO1-xFxBiS2 was found to enhance superconducting properties.By using this samples, the first observation of magnetic vortices in BiCh2 compounds was succeeded. This result expects to lead to the elucidation of the mechanism of the superconductivity in BiCh2 compounds.

Academic Significance and Societal Importance of the Research Achievements

本研究では、BiCh2(Ch=S,Se)系化合物において発現する超周期構造と超伝導の相関性を調査した。BiCh2(Ch=S,Se)系化合物は現在世界的に注目されている物質である。今回の研究では、この物質において発現する超周期構造がパイエルス型の構造でなく、超伝導とも共存する可能性があることを明らかにした。また、本系で磁束量子観測も出来る試料の合成に世界で初めて成功した。そのため本研究の成果から、世界的に注目されている物質の超伝導機構の解明につながることが期待される。

Report

(3 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • Research Products

    (39 results)

All 2019 2018 Other

All Journal Article (5 results) (of which Peer Reviewed: 5 results,  Open Access: 5 results) Presentation (33 results) (of which Int'l Joint Research: 13 results,  Invited: 2 results) Remarks (1 results)

  • [Journal Article] Ordered States Coexisting with Superconductivity in BiCh2 Materials2019

    • Author(s)
      Satoshi Demura
    • Journal Title

      J. Phys. Soc. Jpn.

      Volume: 88 Issue: 4 Pages: 041002-041002

    • DOI

      10.7566/jpsj.88.041002

    • NAID

      40021866416

    • Related Report
      2019 Annual Research Report 2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Single Crystal Growth and Superconducting Properties of Antimony-Substituted NdO0.7F0.3BiS22018

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

      Condens. Matter.

      Volume: 3 Issue: 1 Pages: 1-7

    • DOI

      10.3390/condmat3010001

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Structural Modulation in LaO0.9F0.1BiSe2 Single Crystals Revealed by Scanning Tunneling Microscopy/Spectroscopy2018

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

      J. Phys.: Conf. Ser.

      Volume: 1054 Pages: 012001-012001

    • DOI

      10.1088/1742-6596/1054/1/012001

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Superposition of √13×√13 and 3×3 supermodulations in TaS2 probed by scanning tunneling microscopy2018

    • Author(s)
      Y. Fujisawa, T. Iwasaki, D. Fujii, S. Ohta, J. Iwashita, T. Fujita, M. Nakata, K. Kishimoto, S. Demura, and H. Sakata
    • Journal Title

      J. Phys.: Conf. Ser.

      Volume: 969 Pages: 012053-012053

    • DOI

      10.1088/1742-6596/969/1/012053

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Electronic statesof domain structure in 1T-TaS2-xSexobserved by STM/STS2018

    • Author(s)
      D. Fujii, T. Iwasaki, K. Akiyama, Y. Fujisawa, S. Demura and H. Sakata
    • Journal Title

      J. Phys.: Conf. Ser.

      Volume: 969 Pages: 012041-012041

    • DOI

      10.1088/1742-6596/969/1/012041

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 走査型トンネル顕微鏡測定を用いたLa(O,F)Bise2における超周期構造の実空間観測2019

    • Author(s)
      出村郷志, 坂田英明, 高野良紀
    • Organizer
      第35回希土類討論会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Observation of Superconducting gap and vortices in BiCh2materials2019

    • Author(s)
      Satoshi Demura, Shotaro Shobu, Kazuki Miyata, Shin-ichi Kaneko, Satoshi Okuma, Hideaki Sakata
    • Organizer
      Spectroscopies in Novel Superconductors 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] BiS2系超伝導体における超周期構造と超伝導状態の走査型トンネル顕微鏡/分光測定2019

    • Author(s)
      出村郷志
    • Organizer
      日本物理学会2019年秋季大会
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] Pb置換したBiS系超伝導体La(O1-x,Fx)BiS2の合成と物性評価2019

    • Author(s)
      福井崇人, 出村郷志, 高瀬浩一, 渡辺忠孝, 高野良紀
    • Organizer
      日本物理学会2019年秋季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Sn置換したLa(OF)BiS2の超伝導特性2019

    • Author(s)
      野口佳那子, 菖蒲章太郎, 出村郷志, 野村温, 坂田英明
    • Organizer
      日本物理学会2019年秋季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Synthesis and superconducting property evaluation of Pb-substituted BiS-based superconductor LaO1-xFxBiS22019

    • Author(s)
      Takahito Fukui, Satoshi Demura, Yoshiki Takano
    • Organizer
      The 32th International Synposyum on Superconductivity
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Evaluation of the physical properties and the real space observation in 2H-TaS2synthesized with flux method2019

    • Author(s)
      S. Ohta, S. Kobayashi, A. Nomura, Y. Fujisawa, Satoshi Demura, H. Sakata
    • Organizer
      The 32th International Synposyum on Superconductivity
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Scanning Tunneling Microscopy/Spectroscopy Study in BiCh2 superconductors2019

    • Author(s)
      Satoshi Demura
    • Organizer
      Materials Research Meeting 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] フラックス法により合成した2H-TaS2単結晶の評価とSTM/STS観察2019

    • Author(s)
      太田竣, 藤澤唯太,出村郷志, 坂田英明
    • Organizer
      日本物理学会第74回年次大会(2019年)
    • Related Report
      2018 Research-status Report
  • [Presentation] 高温成長させたZrTe3単結晶における抵抗異常2019

    • Author(s)
      小林天, 田中淳也, 宮田一輝, 太田竣, 出村郷志, 坂田英明
    • Organizer
      日本物理学会第74回年次大会(2019年)
    • Related Report
      2018 Research-status Report
  • [Presentation] Se置換したZrTe3の走査トンネル顕微鏡観察II2019

    • Author(s)
      出村郷志, 宮田一輝, 石尾亮太, 坂田英明
    • Organizer
      日本物理学会第74回年次大会(2019年)
    • Related Report
      2018 Research-status Report
  • [Presentation] Supermodulation in BiCh2-based superconductor LaO1-xFxBiSe2 revealed by scanning tunneling microscopy /spectroscopy2018

    • Author(s)
      S. Demura, N. Ishida, H. Sakata
    • Organizer
      European Materials Research Society 2018 fall meeting
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] STM and STS study on Se doped 1T-TaS22018

    • Author(s)
      D. Fujii, Y. Fujisawa, K. Akiyama, T. Iwasaki, S. Demura, and H. Sakata
    • Organizer
      the 31th International Symposium on Superconductivity
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Microscopic Study of Domain Structure in Charge Density Wave States in 2H-TaS2-xSex2018

    • Author(s)
      S. Ohta, Y. Fujisawa, S. Demura, H. Sakata
    • Organizer
      the 31th International Symposium on Superconductivity
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Observation of microscopic electronic states in ZrTe3-xSex by STM/STS2018

    • Author(s)
      K. Miyata, R. Ishio, S. Demura, H. Sakata
    • Organizer
      the 31th International Symposium on Superconductivity
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Real Space Observation of Ag-Intercalated 2H-NbSe2 by Scanning Tunneling Microscopy2018

    • Author(s)
      K. Mogami, K. Takahashi, S. Ohta, D. Fujii, S. Demura, H. Sakata
    • Organizer
      the 31th International Symposium on Superconductivity
    • Related Report
      2018 Research-status Report
  • [Presentation] Reduction of Tc by Ag intercalation in 2H-NbSe22018

    • Author(s)
      K. Takahashi, K. Mogami, S. Ohta, Y. Sakai, D. Fujii, S. Demura, H. Sakata
    • Organizer
      the 31th International Symposium on Superconductivity
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Substitution effect in (La,Sr)O0.5F0.5Bi1-xPbxS22018

    • Author(s)
      S. Shobu, S. Demura, H. Sakata
    • Organizer
      the 31th International Symposium on Superconductivity
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] CDW state in misfit transition-metal dichalcogenide (MS)(TaS2) (M=Bi,Pb,Sb,Sn)2018

    • Author(s)
      S. Doyama, Y. Sugai, S. Ohta, S. Demura, H. Sakata
    • Organizer
      the 31th International Symposium on Superconductivity
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Observation of Supermodulation in LaO1-xFxBiSe2 by scanning tunneling microscopy /spectroscopy2018

    • Author(s)
      S. Demura, N. Ishida, S. Ohta, and H. Sakata
    • Organizer
      the 12th International Conference on Materials and Mechanisms of Superconductivity
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] STM Observation of Charge Density Wave States in 2H-TaS1-xSex2018

    • Author(s)
      S. Ohta, Y. Fujisawa, S. Demura, and H. Sakata
    • Organizer
      the 12th International Conference on Materials and Mechanisms of Superconductivity
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 高圧アニール法によって得られたLa(O,F)BiS2単結晶の物性評価2018

    • Author(s)
      出村郷志,高野義彦, 坂田英明
    • Organizer
      日本物理学会2018年秋季大会
    • Related Report
      2018 Research-status Report
  • [Presentation] 走査型トンネル顕微鏡測定を用いたLa(O,F)BiCh2(Ch=S, Se)における超周期構造の実空間観測2018

    • Author(s)
      出村郷志,石田直樹, 宮田一輝, 坂井優斗, 藤澤唯太, 坂田英明
    • Organizer
      日本物理学会第73回年次大会
    • Related Report
      2018 Research-status Report
  • [Presentation] Se置換した1T-TaS2の走査トンネル顕微鏡による分域構造の研究2018

    • Author(s)
      藤井大智, 藤澤唯太, 秋山健太, 岩崎貴洋, 出村郷志,坂田英明
    • Organizer
      日本物理学会2018年秋季大会
    • Related Report
      2018 Research-status Report
  • [Presentation] LaO0.5F0.5BiS2におけるLaおよびBiサイトの元素置換効果2018

    • Author(s)
      菖蒲章太郎, 出村郷志,坂田英明
    • Organizer
      日本物理学会2018年秋季大会
    • Related Report
      2018 Research-status Report
  • [Presentation] 2H-TaS2-xSexにおけるCDWのSTMによる実空間観察II2018

    • Author(s)
      太田竣, 藤澤唯太, 出村郷志,坂田英明
    • Organizer
      日本物理学会2018年秋季大会
    • Related Report
      2018 Research-status Report
  • [Presentation] Agをインターカレートした2H-NbSe2のSTMによる実空間観察2018

    • Author(s)
      最上堅太, 高橋好佑, 太田竣, 藤井大智, 出村郷志, 坂田英明
    • Organizer
      日本物理学会2018年秋季大会
    • Related Report
      2018 Research-status Report
  • [Presentation] ミスフィット層状化合物(MS)(TaS2)(M=Bi,Pb,Sb,Sn)のCDW2018

    • Author(s)
      堂山俊, 菅井裕太, 宮田一輝, 太田竣, 出村郷志, 坂田英明
    • Organizer
      日本物理学会2018年秋季大会
    • Related Report
      2018 Research-status Report
  • [Presentation] Ag intercalation による遷移金属ダイカルコゲナイドの物性の制御2018

    • Author(s)
      高橋好佑, 最上堅太, 太田竣, 坂井優斗, 藤井大智, 出村郷志, 坂田英明
    • Organizer
      日本物理学会2018年秋季大会
    • Related Report
      2018 Research-status Report
  • [Presentation] Se置換したZrTe3の走査トンネル顕微鏡観察2018

    • Author(s)
      宮田一輝, 石尾亮太, 出村郷志, 坂田英明
    • Organizer
      日本物理学会2018年秋季大会
    • Related Report
      2018 Research-status Report
  • [Presentation] 超伝導体Ca1-xRxFeAsF1-y (R = La, Pr)の物性評価2018

    • Author(s)
      藤澤孝, 出村郷志, 渡辺忠孝, 高瀬浩一, 高野良紀
    • Organizer
      日本物理学会2018年秋季大会
    • Related Report
      2018 Research-status Report
  • [Presentation] 2H-Ta2-xSexにおけるCDWのSTMによる実空間観察2018

    • Author(s)
      太田峻, 藤澤唯太, 出村郷志,坂田英明
    • Organizer
      日本物理学会第73回年次大会
    • Related Report
      2018 Research-status Report
  • [Presentation] ZrTe3-xSexにおけるSTM/STS測定II2018

    • Author(s)
      石尾亮太, 石田直樹, 藤澤唯太, 出村郷志, 坂田英明
    • Organizer
      日本物理学会第73回年次大会
    • Related Report
      2018 Research-status Report
  • [Remarks]

    • URL

      http://www.phys.cst.nihon-u.ac.jp/~demura/publication.html

    • Related Report
      2019 Annual Research Report

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Published: 2018-04-23   Modified: 2021-02-19  

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