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Phase diagram, electronic structure, and superconductivity of iron-based superconductors

Research Project

Project/Area Number 17K05556
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Condensed matter physics II
Research InstitutionNational Institute for Materials Science

Principal Investigator

TERASHIMA Taichi  国立研究開発法人物質・材料研究機構, 国際ナノアーキテクトニクス研究拠点, グループリーダー (40343834)

Project Period (FY) 2017-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords鉄系超伝導体 / 量子振動 / フェルミ面 / ピーク効果 / 弾性抵抗 / ネマチック揺らぎ / ネマチック / elastoresistivity / 磁気トルク / QSGW法 / ディラック電子 / ベリー位相 / 超伝導材料 / 物性実験 / 強相関電子系
Outline of Final Research Achievements

(1)The Fermi surface in an iron-based superconductor parent compound CaFeAsF and an iron-based superconductor compound FeS was determined via quantum-oscillation measurements. The existence of Dirac fermions in CaFeAsF was established from the analysis of the oscillation phase.
(2) The magnetic torque in iron-based superconductor parent compounds Ba1-xKxFe2As2(X ~ 0.69, 0.76) was measured. A pronounced peak effect was observed, and a first-order-transition-like jump of the torque was observed.
(3) Elastoresistance measurements on iron-based superconductor parent compounds Ba0.5K0.5Fe2As2, CaKFe4As4, and KCa2Fe4As4F2 were performed. All the three compounds exhibit a pronounced enhancement of elestoresistance as the temperature is lowered.

Academic Significance and Societal Importance of the Research Achievements

2008年に東工大・細野教授らの報告した鉄系超伝導体は、銅酸化物超伝導体に次ぐ高い超伝導転移温度を持ち、実用化に期待が持たれている。一方で、より高い転移温度を実現するために、超伝導発現機構解明のための基礎研究も盛んに進められている。本研究では、金属の電子状態を理解するために最も基礎となるフェルミ面を、量子振動測定により決定すること。elastoresistanceと呼ばれる測定により電子状態の異方性を明らかにすること。線材応用にとって重要な磁束のピン止めに関連するピーク効果を調べることなどを実施して、鉄系超伝導体の基礎的理解を深めることに努めた。

Report

(5 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (23 results)

All 2020 2019 2018 2017 Other

All Int'l Joint Research (8 results) Journal Article (4 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 4 results,  Open Access: 1 results) Presentation (9 results) (of which Int'l Joint Research: 4 results,  Invited: 3 results) Remarks (2 results)

  • [Int'l Joint Research] SIMIT, CAS/CAS CENSE(中国)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] National High Magnetic Field Laboratory(米国)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] Nanjing University(中国)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] SIMIT(中国)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] SIMIT, CAS/Nanjing University(中国)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] National High Magnetic Field Laboratory(米国)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] SIMIT, Chinese Academy of Sciences/CENSE(中国)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] National High Magnetic Field Laboratory(米国)

    • Related Report
      2017 Research-status Report
  • [Journal Article] Elastoresistance measurements on CaKFe4As4 and KCa2Fe4As4F2 with the Fe site of C2v symmetry2020

    • Author(s)
      Terashima Taichi、Matsushita Yoshitaka、Yamase Hiroyuki、Kikugawa Naoki、Abe Hideki、Imai Motoharu、Uji Shinya、Ishida Shigeyuki、Eisaki Hiroshi、Iyo Akira、Kihou Kunihiro、Lee Chul-Ho、Wang Teng、Mu Gang
    • Journal Title

      Physical Review B

      Volume: 102 Issue: 5

    • DOI

      10.1103/physrevb.102.054511

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Accurate determination of the Fermi surface of tetragonal FeS via quantum oscillation measurements and quasiparticle self-consistent GW calculations2019

    • Author(s)
      Taichi Terashima, Naoki Kikugawa, David Graf, Hishiro T. Hirose, Shinya Uji, Yoshitaka Matsushita, Hai Lin, Xiyu Zhu, Hai-Hu Wen, Takuya Nomoto, Katsuhiro Suzuki, and Hiroaki Ikeda
    • Journal Title

      Phys. Rev. B

      Volume: 99 Issue: 13 Pages: 134501-134501

    • DOI

      10.1103/physrevb.99.134501

    • Related Report
      2019 Research-status Report 2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Anomalous peak effect in iron-based superconductors Ba1-xKxFe2As2 (x ~ 0.69 and 0.76) for magnetic-field directions close to the ab plane and its possible relation to the spin paramagnetic effect2019

    • Author(s)
      Terashima Taichi、Kikugawa Naoki、Kiswandhi Andhika、Choi Eun-Sang、Kihou Kunihiro、Ishida Shigeyuki、Lee Chul-Ho、Iyo Akira、Eisaki Hiroshi、Uji Shinya
    • Journal Title

      Physical Review B

      Volume: 99 Issue: 9

    • DOI

      10.1103/physrevb.99.094508

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Fermi Surface with Dirac Fermions in CaFeAsF Determined via Quantum Oscillation Measurements2018

    • Author(s)
      Taichi Terashima, Hishiro T. Hirose, David Graf, Yonghui Ma, Gang Mu, Tao Hu, Katsuhiro Suzuki, Shinya Uji, and Hiroaki Ikeda
    • Journal Title

      PHYSICAL REVIEW X

      Volume: 8 Issue: 1 Pages: 0110141-11

    • DOI

      10.1103/physrevx.8.011014

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Fermi surface with Dirac fermions in an iron-based superconductor parent compound CaFeAsF via quantum oscillation measurements2019

    • Author(s)
      Taichi Terashima
    • Organizer
      International Conference on Spectroscopies in Novel Superconductors (SNS 2019)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Quantum-oscillation Fermiology of 1111 and 11 iron-based superconductor (parent) compounds2019

    • Author(s)
      Taichi Terashima
    • Organizer
      Superstripes 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Effective masses of carriers in iron pnictides/chalcogenides and other superconductors determined via quantum oscillations2019

    • Author(s)
      Taichi Terashima
    • Organizer
      International Conference "ELECTRON CORRELATION IN SUPERCONDUCTORS AND NANOSTRUCTURES" (ECSN-2019)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 量子振動測定とGW近似計算によるFeSのフェルミ面決定2018

    • Author(s)
      寺嶋太一、菊川直樹、David GrafA、廣瀬陽代、宇治進也、松下能孝、Hai LinB、Xiyu Zhu、 Hai-Hu Wen、野本拓也、鈴木雄大、池田浩章
    • Organizer
      日本物理学会 2018年秋季大会
    • Related Report
      2018 Research-status Report
  • [Presentation] CaFeAsFのフェルミ面とベリー位相2018

    • Author(s)
      寺嶋太一、廣瀬陽代、David Graf、Yonghui Ma、Gang Mu、 Tao Hu、鈴木雄大、宇治進也、池田浩章
    • Organizer
      日本物理学会 2018年秋季大会
    • Related Report
      2018 Research-status Report
  • [Presentation] 寺嶋太一、廣瀬陽代、David Graf、Yonghui Ma、Gang Mu、 Tao Hu、鈴木雄大、宇治進也、池田浩章2018

    • Author(s)
      CaFeAsFのフェルミ面とベリー位相の検出
    • Organizer
      つくば-柏-本郷 超伝導かけはしプロジェクト ワークショップ(1)
    • Related Report
      2017 Research-status Report
  • [Presentation] Fermi surface studies of iron-based superconductors via quantum oscillation measurements2017

    • Author(s)
      Taichi Terashima
    • Organizer
      International Workshop on recent progress in superconductivity
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 鉄系超伝導体 Ba1-xKxFe2As2 のピーク効果と磁束系の逐次相転移2017

    • Author(s)
      寺嶋太一、菊川直樹、Kiswandhi Andhika、Choi Eun-Sang、木方邦宏、石田茂之、 李哲虎、伊豫彰、永崎洋、宇治進也
    • Organizer
      日本物理学会 2017年秋季大会
    • Related Report
      2017 Research-status Report
  • [Presentation] 寺嶋太一、廣瀬陽代、David Graf、Yonghui Ma、Gang Mu、 Tao Hu、鈴木雄大、宇治進也、池田浩章2017

    • Author(s)
      強磁場を使った鉄系超伝導体のフェルミ面研究
    • Organizer
      強磁場コラボラトリーが拓く未踏計測領域への挑戦と物質・材料科学の最先端
    • Related Report
      2017 Research-status Report
  • [Remarks] 機能性材料研究拠点 量子輸送特性グループ

    • URL

      https://www.nims.go.jp/nqt/index.html

    • Related Report
      2018 Research-status Report
  • [Remarks]

    • URL

      https://samurai.nims.go.jp/profiles/terashima_taichi

    • Related Report
      2017 Research-status Report

URL: 

Published: 2017-04-28   Modified: 2022-01-27  

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