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Physics of Spin-triplet superconductivity

Research Project

Project/Area Number 19H00657
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Review Section Medium-sized Section 13:Condensed matter physics and related fields
Research InstitutionOkayama University

Principal Investigator

Zheng Guo-qing  岡山大学, 環境生命自然科学学域, 教授 (50231444)

Co-Investigator(Kenkyū-buntansha) 俣野 和明  岡山大学, 自然科学学域, 助教 (70630945)
川崎 慎司  岡山大学, 自然科学学域, 准教授 (80397645)
市岡 優典  岡山大学, 異分野基礎科学研究所, 教授 (90304295)
Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥44,590,000 (Direct Cost: ¥34,300,000、Indirect Cost: ¥10,290,000)
Fiscal Year 2022: ¥7,930,000 (Direct Cost: ¥6,100,000、Indirect Cost: ¥1,830,000)
Fiscal Year 2021: ¥14,040,000 (Direct Cost: ¥10,800,000、Indirect Cost: ¥3,240,000)
Fiscal Year 2020: ¥16,510,000 (Direct Cost: ¥12,700,000、Indirect Cost: ¥3,810,000)
Fiscal Year 2019: ¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000)
Keywordsスピン三重項超伝導 / トポロジカル量子現象 / 核磁気共鳴 / トポロジカル超伝導 / 量子臨界点
Outline of Research at the Start

(Cu,Sr)xBi2Se3や(K,Rb)2Cr3As3、RPtBi等では、強いスピン軌道相互作用が物性科学の新しいフロンテイアを生み出している。CuxBi2Se3においては、スピン三重項超伝導という際立った物性の発現が申請者らによって明らかにされた。しかし、スピン三重項超伝導の物理の多くはまだ解明されていない。本研究では、これらの物質群においてNMR測定や磁化測定等を行い、スピン三重項の特有な新奇物性を明らかにする。

Outline of Final Research Achievements

We have succeeded in tuning the vector order parameter by carrier density and by magnetic fields in the spin-triplet superconductors CuxBi2Se3. In particular, the upper critical field shows a two-fold symmetry in the hexagonal plane at low fields, but is found to show a six-fold symmetry. This feature is a complementary proof of CuxBi2Se3 being a spin-triplet superconductor described by two-components order parameter. We also found that the orbital function possesses a px symmetry. In the strongly-correlated electron system K2Cr3As3, we discovered the spin-triplet state, and obtained evidence for multiple superconducting phases.

Academic Significance and Societal Importance of the Research Achievements

スピン三重項超伝導はまだ稀有な現象であり、その物理はなお開拓途上である。特に、スピン自由度に起因する物性が豊富であり、それに対する理解は今後の工業応用への展開にとって重要である。本研究で明らかにした磁場によるスピン三重項超伝導の可制御性や、軌道関数の解明及び多重相の発見は、その学術的な意義が大きく、また、量子計算への応用の基礎を成すものでもある。

Report

(6 results)
  • 2023 Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • 2019 Comments on the Screening Results   Annual Research Report
  • Research Products

    (45 results)

All 2024 2023 2021 2020 2019 Other

All Int'l Joint Research (4 results) Journal Article (14 results) (of which Int'l Joint Research: 12 results,  Peer Reviewed: 14 results,  Open Access: 4 results) Presentation (24 results) (of which Int'l Joint Research: 10 results,  Invited: 7 results) Book (1 results) Remarks (2 results)

  • [Int'l Joint Research] Institute of Physics(中国)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] ロスアラモス国立研究所(米国)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] 中国科学院物理研究所(中国)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] Institute of Physics,/Chinese Academy of Sciences(中国)

    • Related Report
      2019 Annual Research Report
  • [Journal Article] Superconducting Transition in Quasi-One-Dimensional Superconductor Cs2Cr3As3 Probed by DC Magnetic Susceptibility2023

    • Author(s)
      Sumiyama Akihiko、Nagaeki Takumi、Yamaguchi Akira、Jia Ke、Yang Jie、Shi Youguo、Zheng Guo-qing
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 92 Issue: 1 Pages: 015001-015001

    • DOI

      10.7566/jpsj.92.015001

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Manipulating the nematic director by magnetic fields in the spin-triplet superconducting state of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>Cu</mml:mi><mml:mi>x</mml:mi></mml:msub><mml:msub><mml:mi>Bi</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>Se</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:mrow></mml:math>2023

    • Author(s)
      Yokoyama M.、Nishigaki H.、Ogawa S.、Nita S.、Shiokawa H.、Matano K.、Zheng Guo-qing
    • Journal Title

      Physical Review B

      Volume: 107 Issue: 10

    • DOI

      10.1103/physrevb.107.l100505

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Commensurate-to-incommensurate transition of charge-density-wave order and a possible quantum critical point in pressurized kagome metal CsV3Sb52023

    • Author(s)
      Feng X. Y.、Zhao Z.、Luo J.、Yang J.、Fang A. F.、Yang H. T.、Gao H. J.、Zhou R.、Zheng Guo-qing
    • Journal Title

      npj Quantum Materials

      Volume: 8 Issue: 1

    • DOI

      10.1038/s41535-023-00555-w

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Single Crystal Growth of and Hyperfine Couplings in the Spin-Triplet Superconductor K<sub>2</sub>Cr<sub>3</sub>As<sub>3</sub>2023

    • Author(s)
      Ogawa Seigo、Miyoshi Tomoki、Matano Kazuaki、Kawasaki Shinji、Inada Yoshihiko、Zheng Guo-qing
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 92 Issue: 6

    • DOI

      10.7566/jpsj.92.064711

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Antiferromagnetic Spin Fluctuations and Unconventional Superconductivity in Topological Superconductor Candidate YPtBi Revealed by 195Pt-NMR2023

    • Author(s)
      Zhou Y.Z.、Chen J.、Li Z.X.、Luo J.、Yang J.、Guo Y.F.、Wang W.H.、Zhou R.、Zheng Guo-qing
    • Journal Title

      Physical Review Letters

      Volume: 130 Issue: 26

    • DOI

      10.1103/physrevlett.130.266002

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Spin-triplet superconductivity in K2Cr3As32021

    • Author(s)
      Yang Jie、Luo Jun、Yi Changjiang、Shi Youguo、Zhou Yi、Zheng Guo-qing
    • Journal Title

      Science Advances

      Volume: 7 Issue: 52

    • DOI

      10.1126/sciadv.abl4432

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Antiferromagnetic spin fluctuations and superconductivity in NbRh$_2$B$_2$ and TaRh$_2$B$_2$ with a chiral crystal structure2021

    • Author(s)
      Kazuaki Matano, Ryo Ogura, Mateo Fountaine, Harald O. Jeschke, Shinji Kawasaki, and Guo-qing Zheng
    • Journal Title

      Physical Review B

      Volume: 104 Issue: 22

    • DOI

      10.1103/physrevb.104.224508

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Microscopic evidence for the intra-unit-cell electronic nematicity inside the pseudogap phase in YBa2Cu4O82021

    • Author(s)
      Wang Wen、Luo Jun、Wang ChunGuang、Yang Jie、Kodama Yasuharu、Zhou Rui、Zheng Guo-Qing
    • Journal Title

      Science China Physics, Mechanics &amp; Astronomy

      Volume: 64 Issue: 3

    • DOI

      10.1007/s11433-020-1615-y

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] NMR and NQR studies on transition-metal arsenide superconductors LaRu<sub>2</sub>As<sub>2</sub>, KCa<sub>2</sub>Fe<sub>4</sub>As<sub>4</sub>F<sub>2</sub>, and A<sub>2</sub>Cr<sub>3</sub>As<sub>3</sub>*2020

    • Author(s)
      Luo Jun、Wang Chunguang、Wang Zhicheng、Guo Qi、Yang Ji、Zhou Rui、Matano K、Oguchi T、Ren Zhian、Cao Guanghan、Zheng Guo-Qing
    • Journal Title

      Chinese Physics B

      Volume: 29 Issue: 6 Pages: 067402-067402

    • DOI

      10.1088/1674-1056/ab892d

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Localized-to-itinerant transition preceding antiferromagnetic quantum critical point and gapless superconductivity in CeRh0.5Ir0.5In52020

    • Author(s)
      Kawasaki Shinji、Oka Toshihide、Sorime Akira、Kogame Yuji、Uemoto Kazuhiro、Matano Kazuaki、Guo Jing、Cai Shu、Sun Liling、Sarrao John L.、Thompson Joe D.、Zheng Guo-qing
    • Journal Title

      Communications Physics

      Volume: 3 Issue: 1 Pages: 1-10

    • DOI

      10.1038/s42005-020-00418-x

    • NAID

      120006884910

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Landau diamagnetism and Weyl-fermion excitations in TaAs revealed by <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>As</mml:mi><mml:mprescripts /><mml:none /><mml:mn>75</mml:mn></mml:mmultiscripts></mml:math> NMR and NQR2020

    • Author(s)
      Wang C. G.、Honjo Yoshiaki、Zhao L. X.、Chen G. F.、Matano K.、Zhou R.、Zheng Guo-qing
    • Journal Title

      Physical Review B

      Volume: 101 Issue: 24

    • DOI

      10.1103/physrevb.101.241110

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Direction and symmetry transition of the vector order parameter in topological superconductors CuxBi2Se32020

    • Author(s)
      Kawai T.、Wang C. G.、Kandori Y.、Honoki Y.、Matano K.、Kambe T.、Zheng Guo-qing
    • Journal Title

      Nature Communications

      Volume: 11 Issue: 1

    • DOI

      10.1038/s41467-019-14126-w

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Relation of Superconducting Pairing Symmetry and Non-Magnetic Impurity Effects in Vortex States2020

    • Author(s)
      Sera Yasuaki、Ueda Takahiro、Adachi Hiroto、Ichioka Masanori
    • Journal Title

      Symmetry

      Volume: 12 Issue: 1 Pages: 175-175

    • DOI

      10.3390/sym12010175

    • NAID

      120006826005

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Tuning the Distance to a Possible Ferromagnetic Quantum Critical Point in A2Cr3As32019

    • Author(s)
      Luo J.、Yang J.、Zhou R.、Mu Q.G.、Liu T.、Ren Zhi-an、Yi C.J.、Shi Y.G.、Zheng Guo-qing
    • Journal Title

      Physical Review Letters

      Volume: 123 Issue: 4

    • DOI

      10.1103/physrevlett.123.047001

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] NMRから見たカゴメ格子超伝導体のCDW秩序,自発内部磁場及び超伝導2024

    • Author(s)
      鄭国慶
    • Organizer
      日本物理学会2024年春季大会、領域8シンポジウム
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] スピン三重項超伝導体K2Cr3As3の純良単結晶育成とNMR2024

    • Author(s)
      小川晟吾, 三好智己, 俣野和明, 川崎慎司, 稲田佳彦, 鄭国慶
    • Organizer
      日本物理学会2024年春季大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] カゴメ超伝導体CsV3Sb5における一軸ひずみ下NMR/NQR2024

    • Author(s)
      小林映斗, 竹内優介, 川崎慎司, 趙勇, 鄭国慶
    • Organizer
      日本物理学会2024年春季大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] CuxBi2Se3におけるスピン三重項ネマティック超伝導の放射光による研究2024

    • Author(s)
      二田晴也, 小林映斗, 高柳颯太, 横山武蔵, 俣野和明, 石井賢司, 中尾裕則, 神戸高志, 鄭国慶
    • Organizer
      日本物理学会2024年春季大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Tuning the nematic director in spin-triplet superconductors CuxBi2Se3 and K2Cr3As32023

    • Author(s)
      Guo-qing Zheng
    • Organizer
      Conference of Condensed Matter Physics 2023 (CCMP 2023), 6-11 August 2023, Liyang, China
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] spin-triplet topological superconductivity in K2Cr3As32021

    • Author(s)
      鄭国慶
    • Organizer
      京都大学基礎物理学研究所研究会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 重い電子系反強磁性超伝導体CeRh0.5Ir0.5In05における局在・遍歴転移と ギャップレス超伝導2021

    • Author(s)
      川崎慎司, 岡利英, 反り目章, 小亀雄司, 上本和宏, 俣野和明, J. Guo, L.L.Sun, J.D.Thompson, J.L. Sarrao
    • Organizer
      日本物理学会第76回年次大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 銅酸化物高温超伝導体Bi2Sr2-xLaxCuO6の一軸圧力下Cu-NMRによる研究2021

    • Author(s)
      吉田翔伍, 川崎慎司, Chengtian Lin, 鄭国慶
    • Organizer
      日本物理学会第76回年次大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] トポロジカル超伝導体CuxBi2Se3の作製と物性測定III2021

    • Author(s)
      横山武蔵, 西垣颯, 俣野和明, 神戸高志, 鄭国慶
    • Organizer
      日本物理学会第76回年次大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] トポロジカル超伝導体CuxBi2Se3におけるネマチック状態ーカイラル状態転移2020

    • Author(s)
      鄭国慶
    • Organizer
      京都大学基礎物理学研究所研究会
    • Related Report
      2020 Annual Research Report
  • [Presentation] NMR studies of topological superconductors2019

    • Author(s)
      K. Matano
    • Organizer
      The 5th Conference on Condensed Matter Physics (CCMP2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] NMR studies of topological superconductors2019

    • Author(s)
      K. Matano
    • Organizer
      Materials Research Meeting 2019(MRM2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Topological superconductivity in correlated and non-correlated electron systems2019

    • Author(s)
      Guo-qing Zheng
    • Organizer
      Asia Pacific Workshop on Highlights of Condensed-Matter Physics (APW2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] opological spin-triplet superconducting states in bulk materials2019

    • Author(s)
      Guo-qing Zheng
    • Organizer
      Nature Conference on Emergence Materials and Device: Electronic Structures and Properties
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Charge-density-wave order in single-layered Bi2Sr2-xLaxCuO6+δ superconductor2019

    • Author(s)
      S. Kawasaki, D. Kamijima, M. Kitahashi, Z. Li, C. T. Lin, P. L. Kuhns, A. P. Reyes, and Guo-qing Zheng
    • Organizer
      Spectroscopies in Novel Superconductors (SNS2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Transition of the gap symmetry in topological superconductors CuxBi2Se32019

    • Author(s)
      K. Matano, T. Kawai, C. G. Wang, Y. Kandori, Y. Honoki, T. Kambe, Guo-qing Zheng
    • Organizer
      International Conference on Topological Materials Science 2019 (TopoMat2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Unconventional Gapless Superconductivity at the Quantum Critical Point in CeRh0.5Ir0.5In52019

    • Author(s)
      S. Kawasaki, T. Oka, A. Sorime, Y. Kogame, K. Uemoto, K. Matano, J. Guo, S. Cai, L. L. Sun, J. L. Sarrao, J. D. Thompson, and Guo-qing Zheng
    • Organizer
      International conference on strongly correlated electron systems 2019 (SCES2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] NMR studies of chiral noncentrosymmetric superconductor TaRh2B22019

    • Author(s)
      Ryo Ogura, Mateo Fountaine, Kazuaki Matano, Shinji Kawasaki, Guo-qing Zheng
    • Organizer
      International conference on strongly correlated electron systems 2019 (SCES2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A2Cr3As3 における強磁性揺らぎと非従来型超伝導2019

    • Author(s)
      鄭国慶
    • Organizer
      京都大学基礎物理学研究所研究会「電子相関が生み出す超伝導現象の未解決問題と新しい潮流
    • Related Report
      2019 Annual Research Report
  • [Presentation] Crystal-dependent d-vector direction and gap-symmetry transition in topological superconductors CuxBi2Se32019

    • Author(s)
      Guo-qing Zheng
    • Organizer
      Spectroscopy on Novel Superconductors 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 重い電子系反強磁性体 Ce3Pt4In13 の低温高圧下 115In-NQR 法による研究2019

    • Author(s)
      小亀雄司, 伊藤大河, 足立智樹, J. Yang, 川崎慎司, 鄭国慶
    • Organizer
      日本物理学会 2019 年秋季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 空間反転対称性の破れた超伝導体 TaRh2B2 の NMR による研究2019

    • Author(s)
      小椋亮, 俣野和明, 川崎慎司, 鄭国慶
    • Organizer
      日本物理学会 2019 年秋季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] CuxBi2Se3 超伝導体の作製と物性測定 II2019

    • Author(s)
      神鳥吉史, 河合哲大, 厚朴優樹, 俣野和明, 神戸高志, 鄭国慶
    • Organizer
      日本物理学会2019年秋季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 超伝導体Sr2RuO4におけるスピン軌道相互作用を考慮したスピン分極2019

    • Author(s)
      小田向志, 市岡優典
    • Organizer
      日本物理学会2019年秋季大会
    • Related Report
      2019 Annual Research Report
  • [Book] 超伝導を詩う2021

    • Author(s)
      鄭国慶
    • Total Pages
      205
    • Publisher
      岡山大学出版会
    • Related Report
      2020 Annual Research Report
  • [Remarks] 岡山大学低温物性物理学研究室

    • URL

      https://www.physics.okayama-u.ac.jp/zheng_homepage/

    • Related Report
      2022 Annual Research Report
  • [Remarks] http://www.physics.okayama-u.ac.jp/zheng_homepage/

    • Related Report
      2020 Annual Research Report

URL: 

Published: 2019-04-18   Modified: 2025-01-30  

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