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Exploration of giant Rashba effect in RO1-xFxBiCh2 ultrathin films

Research Project

Project/Area Number 17K19058
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Research Field Applied condensed matter physics and related fields
Research InstitutionTokyo Metropolitan University

Principal Investigator

MIZUGUCHI Yoshikazu  首都大学東京, 理学研究科, 准教授 (50609865)

Co-Investigator(Kenkyū-buntansha) 斉藤 光史  首都大学東京, システムデザイン研究科, 助教 (70452092)
Project Period (FY) 2017-06-30 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2018: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2017: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Keywords層状化合物 / BiCh2系層状化合物 / 単結晶 / へき開法 / 薄膜 / 微細加工 / 磁気抵抗 / 量子振動 / 超薄膜化 / デバイス / ネマティック超伝導 / 異方性 / 超伝導 / 強磁場測定 / 輸送測定 / デバイス化 / キャリアドープ
Outline of Final Research Achievements

Single crystals of RE(O,F)BiCh2 were successfully grown, where RE and Ch are rare earth and chalcogen elements, respectively. We have fabricated a Hall-bar-shaped thin film sample of La(O,F)BiSSe. For the next step, we will carry out magnetoresistance measurements and try to observe quantum oscillation on the La(O,F)BiSSe devise. We have investigated the low-temperature properties of bulk crystals in parallel to the devise fabrication. As a result, unexpected symmetry breaking in the magnetoresistance. This phenomena would be related to nematic superconductivity in La(O,F)BiSSe.

Academic Significance and Societal Importance of the Research Achievements

超伝導体や熱電材料として理論的・実験的に研究が進められてきたBiCh2系層状化合物において,薄膜化およびデバイス化を試みたことは新規性があり,本物質系の今後のさらなる発展につながると考えている.薄膜デバイスを完成させ,量子振動測定を実現すれば,BiCh2系において理論的に予測された巨大ラシュバ効果を実験的に確認できることになり,物質科学分野に新しい機能性材料を提案できることにつながる.また,バルク単結晶で観測した磁気抵抗異方性は,ネマティック物性の研究分野に新たな研究対象を与えると期待している.

Report

(3 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • Research Products

    (19 results)

All 2019 2018 2017 Other

All Journal Article (6 results) (of which Peer Reviewed: 6 results,  Open Access: 2 results) Presentation (11 results) (of which Int'l Joint Research: 6 results,  Invited: 4 results) Remarks (2 results)

  • [Journal Article] Two-Fold-Symmetric Magnetoresistance in Single Crystals of Tetragonal BiCh2-Based Superconductor LaO0.5F0.5BiSSe2019

    • Author(s)
      K. Hoshi, M. Kimata, Y. Goto, T. D. Matsuda, Y. Mizuguchi
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 88 Issue: 3 Pages: 033704-033704

    • DOI

      10.7566/jpsj.88.033704

    • NAID

      210000135115

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Material Development and Physical Properties of BiS2-Based Layered Compounds2019

    • Author(s)
      Y. Mizuguchi
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 88 Issue: 4 Pages: 041001-041001

    • DOI

      10.7566/jpsj.88.041001

    • NAID

      40021866407

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Selenium isotope effect in layered bismuth chalcogenide superconductor LaO0.6F0.4Bi(S,Se)22018

    • Author(s)
      K. Hoshi, Y. Goto, Y. Mizuguchi
    • Journal Title

      Phys. Rev. B

      Volume: 97 Issue: 9 Pages: 094509-094513

    • DOI

      10.1103/physrevb.97.094509

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Evolution of Anisotropic Displacement Parameters and Superconductivity with Chemical Pressure in BiS2- Based REO0.5F0.5BiS2 (RE = La, Ce, Pr, and Nd)2018

    • Author(s)
      Y. Mizuguchi, K. Hoshi, Y. Goto, A. Miura, K. Tadanaga, C. Moriyoshi, Y. Kuroiwa
    • Journal Title

      J. Phys. Soc. Jpn.

      Volume: 87 Issue: 2 Pages: 023704-023707

    • DOI

      10.7566/jpsj.87.023704

    • NAID

      210000134687

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] SnAs-Based Layered Superconductor NaSn2As22017

    • Author(s)
      Goto Yosuke、Yamada Akira、Matsuda Tatsuma D.、Aoki Yuji、Mizuguchi Yoshikazu
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 86 Issue: 12 Pages: 123701-123701

    • DOI

      10.7566/jpsj.86.123701

    • NAID

      210000134601

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Bulk Superconductivity Induced by Se Substitution in BiCh2- Based Layered Compounds Eu0.5Ce0.5FBiS2-xSex2017

    • Author(s)
      Y. Goto, R. Sogabe, Y. Mizuguchi
    • Journal Title

      J. Phys. Soc. Jpn.

      Volume: 86 Issue: 10 Pages: 104712-104716

    • DOI

      10.7566/jpsj.86.104712

    • NAID

      210000134560

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Presentation] Material Development and Physical Properties of BiS2-Based Layered Compounds2019

    • Author(s)
      Y. Mizuguchi
    • Organizer
      ECMP 2019
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] New strategies for designing BiCh2-based layered superconductors2018

    • Author(s)
      Y. Mizuguchi
    • Organizer
      J-Physics 2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] BiCh2 系超伝導体における上部臨界磁場の面内異方性2018

    • Author(s)
      星和久,後藤陽介,水口佳一,木俣基
    • Organizer
      日本物理学会 (2018 年秋季大会)
    • Related Report
      2018 Annual Research Report
  • [Presentation] 「層状硫化ビスマス超伝導体の発見」(凝縮系科学賞記念講演)2018

    • Author(s)
      水口佳一
    • Organizer
      第12回 物性科学領域横断研究会
    • Related Report
      2018 Annual Research Report
  • [Presentation] BiCh2系超伝導体LaO0.5F0.5BiSSeにおける電気抵抗面内異方性2018

    • Author(s)
      星和久
    • Organizer
      第12回 物性科学領域横断研究会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 高圧効果・化学圧力効果を用いた新超伝導体の開拓2018

    • Author(s)
      水口佳一
    • Organizer
      第62回化合物新磁性材料専門研究会
    • Related Report
      2017 Research-status Report
  • [Presentation] Material design strategies for BiCh2-based layered superconductors2017

    • Author(s)
      Y. Mizuguchi
    • Organizer
      Superstripes 2017
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Importance of local crystal structure for superconductivity of BiCh2-based layered compounds2017

    • Author(s)
      Y. Mizuguchi
    • Organizer
      E-MRS 2017 Fall meeting
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] BiS2層を持つ新超伝導体LaO1-xFxBiS2の物性2017

    • Author(s)
      水口佳一
    • Organizer
      物理学会平成29年度秋季大会
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] Superconductivity of layered BiS2-based systems2017

    • Author(s)
      Y. Mizuguchi
    • Organizer
      J-Physics2017
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Unconventional superconductivity in BiCh2-based superconductor revealed by isotope effect2017

    • Author(s)
      Y. Mizuguchi
    • Organizer
      CEMS symposium on trends in condensed matter physics
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Remarks] 首都大学東京 超伝導物質研究室

    • URL

      http://www.comp.tmu.ac.jp/eeesuper/mizuguchilab/activities.html

    • Related Report
      2018 Annual Research Report
  • [Remarks] 首都大学東京 超伝導物質研究室 ホームページ

    • URL

      http://www.comp.tmu.ac.jp/eeesuper/mizuguchilab/activities.html

    • Related Report
      2017 Research-status Report

URL: 

Published: 2017-07-21   Modified: 2020-03-30  

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