Symmetry breaking phenomena in the pseudogap state of cuprates

• Project/Area Number: 18H01177
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 13030:Magnetism, superconductivity and strongly correlated systems-related
• Research Institution: Kyoto University
• Principal Investigator: Kasahara Shigeru 京都大学, 理学研究科, 特定准教授 (10425556)
• Project Period (FY): 2018-04-01 – 2021-03-31
• Project Status: Completed (Fiscal Year 2020)
• Budget Amount: ¥17,030,000 (Direct Cost: ¥13,100,000、Indirect Cost: ¥3,930,000); Fiscal Year 2020: ¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000); Fiscal Year 2019: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000); Fiscal Year 2018: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
• Keywords: 銅酸化物高温超伝導体 / 擬ギャップ相 / 回転対称性の破れ / 電子ネマティック秩序 / イリジウム酸化物 / アナポール秩序 / 奇パリティ秩序 / 磁気トルク測定 / 電子ネマティック転移 / 磁気トルク / 隠れた秩序 / 擬ギャップ状態 / ネマティック転移 / 回転対称性

Outline of Final Research Achievements

Elucidating the nature of the pseudogap state that emerges in a wide range of the phase diagram of cuprate superconductors is one of the most enigmatic issues in modern condensed matter physics. Here, by using ultra-sensitive magnetic torque experiments, we investigate the pseudogap state of a tetragonal cuprate superconductor HgBa2CuO4+d (Hg1201) with only one CuO2 layer per primitive cell. Our key findings are two-folded: First, we found a distinct two-fold in-plane anisotropy that sets in below the pseudogap temperature T*, providing thermodynamic evidence for an electronic nematic transition. Second, we found that the nematic director in Hg1201 orients along the diagonal direction in the CuO2 square lattice, in sharp contrast to the bond nematicity along the Cu-O-Cu direction. These results highlight that the pseudogap state is a distinct ordered phase, that is different from charge-density-wave or its precursors along the Cu-O-Cu bond direction.

Academic Significance and Societal Importance of the Research Achievements

本研究成果は、擬ギャップ相での回転対称性の破れが系に依存することを示しており、現代物理学における最重要問題の一つとされる擬ギャップ状態の微視的起源を明らかにする上で極めて重要な結果と考えられる。さらに、本研究では新しい系として、5dイリジウム酸化物Sr2IrO4の隠れた秩序状態について、これが奇パリティのアナポール秩序であることを示した。これらはモット絶縁近傍において強く相互作用する電子系が示す新奇電子状態の存在を示したものであり、学術的に意義のあるものといえる。

Research Products

• [Int'l Joint Research] University of Colorado Boulder/Rutgers University(米国)
• [Int'l Joint Research] Radboud University(オランダ)
• [Int'l Joint Research] University of Bristol(英国)
• [Int'l Joint Research] University of Minnesota/University of Colorado Boulder(米国)
• [Int'l Joint Research] Helmholtz-Zentrum Dresden-Rossendorf(ドイツ)
• [Int'l Joint Research] Radboud University(オランダ)
• [Int'l Joint Research] University of Bristol(英国)
• [Int'l Joint Research] Oxford Univ.(英国)
• [Int'l Joint Research] EMFL Nijmegen(オランダ)
• [Int'l Joint Research] Ruhr-Universitat Bochum(ドイツ)
• [Journal Article] Bond Directional Anapole Order in a Spin-Orbit Coupled Mott Insulator Sr2(Ir1-xRhx)O4 (2021)
  • Author(s): H. Murayama, K. Ishida, R. Kurihara, T. Ono, Y. Sato, Y. Kasahara, H. Watanabe, Y. Yanase, G. Cao, Y. Mizukami, T. Shibauchi, Y. Matsuda, and S. Kasahara
  • Journal Title: Phys. Rev. X Volume: 11 Issue: 1 Pages: 011021-011021
  • DOI: 10.1103/physrevx.11.011021
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Presence and absence of itinerant gapless excitations in the quantum spin liquid candidate EtMe3Sb[Pd(dmit)2]2 (2020)
  • Author(s): Yamashita M.、Sato Y.、Tominaga T.、Kasahara Y.、Kasahara S.、Cui H.、Kato R.、Shibauchi T.、Matsuda Y.
  • Journal Title: Physical Review B Volume: 101 Issue: 14 Pages: 140407-140407
  • DOI: 10.1103/physrevb.101.140407
  • Peer Reviewed / Open Access
• [Journal Article] In-plane electronic anisotropy resulted from ordered magnetic moment in iron-based superconductors (2020)
  • Author(s): Wu S.-F.、Zhang W.-L.、Thorsmolle V. K.、Chen G. F.、Tan G. T.、Dai P. C.、Shi Y. G.、Jin C. Q.、Shibauchi T.、Kasahara S.、Matsuda Y.、Sefat A. S.、Ding H.、Richard P.、Blumberg G.
  • Journal Title: Physical Review Research Volume: 2 Issue: 3 Pages: 033140-033140
  • DOI: 10.1103/physrevresearch.2.033140
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Non-Fermi Liquid Transport in the Vicinity of the Nematic Quantum Critical Point of Superconducting FeSe1-xSx (2020)
  • Author(s): W. K. Huang, S. Hosoi, M. Culo, S. Kasahara, Y. Sato, K. Matsuura, Y. Mizukami, M. Berben, N. E. Hussey, H. Kontani, T. Shibauchi, and Y. Matsuda
  • Journal Title: Phys. Rev. Res. Volume: 2 Issue: 3 Pages: 033367-033367
  • DOI: 10.1103/physrevresearch.2.033367
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Bose-Einstein Condensation Superconductivity Induced by Disappearance of the Nematic State (2020)
  • Author(s): T. Hashimoto, Y. Ota, A. Tsuzuki, T. Nagashima, A. Fukushima, S. Kasahara, Y. Matsuda, K. Matsuura, Y. Mizukami, T. Shibauchi, S. Shin, and K. Okazaki
  • Journal Title: Sci. Adv. Volume: 6 Issue: 45
  • DOI: 10.1126/sciadv.abb9052
  • Peer Reviewed / Open Access
• [Journal Article] Effect of quenched disorder on the quantum spin liquid state of the triangular-lattice antiferromagnet 1T?TaS2 (2020)
  • Author(s): Murayama H.、Sato Y.、Taniguchi T.、Kurihara R.、Xing X. Z.、Huang W.、Kasahara S.、Kasahara Y.、Kimchi I.、Yoshida M.、Iwasa Y.、Mizukami Y.、Shibauchi T.、Konczykowski M.、Matsuda Y.
  • Journal Title: Physical Review Research Volume: 2 Issue: 1 Pages: 013099-013099
  • DOI: 10.1103/physrevresearch.2.013099
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Evidence for an FFLO State with Segmented Vortices in the BCS-BEC-Crossover Superconductor FeSe (2020)
  • Author(s): S. Kasahara, Y. Sato, S. Licciardello, M. Culo, S. Arsenijevic, T. Ottenbros, T. Tominaga, J. Boker, I. Eremin, T. Shibauchi, J. Wosnitza, N. E. Hussey, and Y. Matsuda,
  • Journal Title: Phys. Rev. Lett. Volume: 124 Issue: 10 Pages: 107001-107001
  • DOI: 10.1103/physrevlett.124.107001
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Ultrafast nematic-orbital excitation in FeSe (2019)
  • Author(s): T. Shimojima, Y. Suzuki, A. Nakamura, N. Mitsuishi, S. Kasahara, T. Shibauchi, Y. Matsuda, Y. Ishida, S. Shin, K. Ishizaka
  • Journal Title: Nature Communications Volume: 10 Issue: 1 Pages: 1946-1946
  • DOI: 10.1038/s41467-019-09869-5
  • Peer Reviewed / Open Access
• [Journal Article] Unconventional thermal metallic state of charge-neutral fermions in an insulator (2019)
  • Author(s): Y. Sato, Z. Xiang, Y. Kasahara, T. Taniguchi, S. Kasahara, L. Chen, T. Asaba, C. Tinsman, H. Murayama, O. Tanaka, Y. Mizukami, T. Shibauchi, F. Iga, J. Singleton, Lu Li, and Y. Matsuda
  • Journal Title: Nature Physics Volume: 15 Issue: 9 Pages: 954-959
  • DOI: 10.1038/s41567-019-0552-2
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Diagonal nematicity in the pseudogap phase of HgBa2CuO4+δ (2019)
  • Author(s): Murayama H.、Sato Y.、Kurihara R.、Kasahara S.、Mizukami Y.、Kasahara Y.、Uchiyama H.、Yamamoto A.、Moon E.-G.、Cai J.、Freyermuth J.、Greven M.、Shibauchi T.、Matsuda Y.
  • Journal Title: Nature Communications Volume: 10 Issue: 1 Pages: 3282-3282
  • DOI: 10.1038/s41467-019-11200-1
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Universal relationship between low-energy antiferromagnetic fluctuations and superconductivity in BaFe2(As1?xPx)2 (2019)
  • Author(s): Kitagawa Shunsaku、Kawamura Takeshi、Ishida Kenji、Mizukami Yuta、Kasahara Shigeru、Shibauchi Takasada、Terashima Takahito、Matsuda Yuji
  • Journal Title: Physical Review B Volume: 100 Issue: 6 Pages: 060503-060503
  • DOI: 10.1103/physrevb.100.060503
  • Peer Reviewed
• [Journal Article] Coexistence of orbital and quantum critical magnetoresistance in FeSe1-xSx (2019)
  • Author(s): Licciardello S.、Maksimovic N.、Ayres J.、Buhot J.、Culo M.、Bryant B.、Kasahara S.、Matsuda Y.、Shibauchi T.、Nagarajan V.、Analytis J. G.、Hussey N. E.
  • Journal Title: Physical Review Research Volume: 1 Issue: 2 Pages: 023011-023011
  • DOI: 10.1103/physrevresearch.1.023011
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Photo-induced possible superconducting state with long-lived disproportionate band filling in FeSe (2019)
  • Author(s): Takeshi Suzuki*, Takashi Someya, Takahiro Hashimoto, Shoya Michimae, Mari Watanabe, Masami Fujisawa, Teruto Kanai, Nobuhisa Ishii, Jiro Itatani, Shigeru Kasahara, Yuji Matsuda, Takasada Shibauchi, Kozo Okazaki*, and Shik Shin*
  • Journal Title: Commun. Phys. Volume: 2 Issue: 1 Pages: 115-115
  • DOI: 10.1038/s42005-019-0219-4
  • Peer Reviewed / Open Access
• [Journal Article] Reciprocity between Local Moments and Collective Magnetic Excitations in the Phase Diagram of BaFe2(As1-xPx)2 (2019)
  • Author(s): J. Pelliciari, K. Ishii, Y. Huang, M. Dantz, X. Lu, P. O. Velasco, V. N. Strocov, S. Kasahara, L. Xing, X. Wang, C. Jin, Y. Matsuda, T. Shibauchi, T. Das, and T. Schmitt,
  • Journal Title: Commun. Phys. Volume: 2 Issue: 1 Pages: 139-139
  • DOI: 10.1038/s42005-019-0236-3
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Measuring magnetic field texture in correlated electron systems under extreme conditions (2019)
  • Author(s): Yip King Yau、Ho Kin On、Yu King Yiu、Chen Yang、Zhang Wei、Kasahara S.、Mizukami Y.、Shibauchi T.、Matsuda Y.、Goh Swee K.、Yang Sen
  • Journal Title: Science Volume: 366 Issue: 6471 Pages: 1355-1359
  • DOI: 10.1126/science.aaw4278
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Evolution of the low-temperature Fermi surface of superconducting FeSe1-xSx across a nematic phase transition (2019)
  • Author(s): Coldea Amalia I.、Blake Samuel F.、Kasahara Shigeru、Haghighirad Amir A.、Watson Matthew D.、Knafo William、Choi Eun Sang、McCollam Alix、Reiss Pascal、Yamashita Takuya、Bruma Mara、Speller Susannah C.、Matsuda Yuji、Wolf Thomas、Shibauchi Takasada、Schofield Andrew J.
  • Journal Title: npj Quantum Materials Volume: 4 Issue: 1 Pages: 2-2
  • DOI: 10.1038/s41535-018-0141-0
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Electrical resistivity across a nematic quantum critical point (2019)
  • Author(s): Licciardello S.、Buhot J.、Lu J.、Ayres J.、Kasahara S.、Matsuda Y.、Shibauchi T.、Hussey N. E.
  • Journal Title: Nature Volume: 567 Issue: 7747 Pages: 213-217
  • DOI: 10.1038/s41586-019-0923-y
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Quantum Vortex Core and Missing Pseudogap in the Multiband BCS-BEC Crossover Superconductor FeSe (2019)
  • Author(s): Hanaguri T.、Kasahara S.、B?ker J.、Eremin I.、Shibauchi T.、Matsuda Y.
  • Journal Title: Physical Review Letters Volume: 122 Issue: 7 Pages: 77001-77001
  • DOI: 10.1103/physrevlett.122.077001
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] 77Se-NMR Study under Pressure on 12%-S Doped FeSe (2019)
  • Author(s): Kuwayama Takanori、Matsuura Kohei、Mizukami Yuta、Kasahara Shigeru、Matsuda Yuji、Shibauchi Takasada、Uwatoko Yoshiya、Fujiwara Naoki
  • Journal Title: Journal of the Physical Society of Japan Volume: 88 Issue: 3 Pages: 033703-033703
  • DOI: 10.7566/jpsj.88.033703
  • NAID: 210000135114
  • Peer Reviewed
• [Journal Article] Two distinct superconducting pairing states divided by the nematic end point in FeSe1-xSx (2018)
  • Author(s): Hanaguri Tetsuo、Iwaya Katsuya、Kohsaka Yuhki、Machida Tadashi、Watashige Tatsuya、Kasahara Shigeru、Shibauchi Takasada、Matsuda Yuji
  • Journal Title: Science Advances Volume: 4 Issue: 5
  • DOI: 10.1126/sciadv.aar6419
  • NAID: 120006471158
  • Peer Reviewed / Open Access
• [Presentation] Sr2Ir1-xRhxO4におけるボンド方向型アナポール秩序 (2021)
  • Author(s): 笠原成, 村山陽奈子, 石田浩祐, 栗原遼, 小野孝浩, 佐藤雄貴, 笠原裕一, 渡邉光, 柳瀬陽一, G. Cao, 水上雄太, 芝内孝禎, 松田祐司
  • Organizer: 日本物理学会 第76回年次大会
• [Presentation] Thermal Hall effect in the pseudogap phase of underdoped cuprates (2021)
  • Author(s): Andre de Oliveira Silva, 笠原成, 村山陽奈子, Neven Barisic, Mario Novak, 芝内孝禎, 笠原裕一, 松田祐司
  • Organizer: 日本物理学会 第76回年次大会
• [Presentation] Evidence for FFLO superconducting states in the BCS-BEC crossover superconductor FeSe (2021)
  • Author(s): Shigeru Kasahara
  • Organizer: American Physical Society (APS) March Meeting
  • Int'l Joint Research / Invited
• [Presentation] FeSeにおけるBCS-BECクロスオーバーとFFLO超伝導 (2021)
  • Author(s): 笠原成
  • Organizer: 物質・材料研究機構 ワークショップ(4)「超伝導物質、トポロジカル物質」
  • Invited
• [Presentation] 強磁場熱輸送測定によるFeSeのab面内磁場下におけるFFLO超伝導の観測 (2020)
  • Author(s): 笠原成, 佐藤雄貴, S. Licciardello, M. Culo, S. Arsenijevic, T. Ottenbros, 冨永貴弘, J.Boker, I. Eremin, 芝内孝禎, J. Wosnitza, N. E. Hussey, 松田祐司
  • Organizer: 日本物理学秋季大会
• [Presentation] 超シャロウバンド構造を有する鉄系超伝導体の新奇 量子物性 (2020)
  • Author(s): 笠原成
  • Organizer: ISSPワークショップ「量子物質研究の最近の進展と今後の展望」
  • Invited
• [Presentation] FFLO superconducting states in FeSe studied in highmagnetic fields (2020)
  • Author(s): Shigeru Kasahara
  • Organizer: ARHMF2020 & KINKEN Materials Science School 2020 for Young Scientists
  • Int'l Joint Research / Invited
• [Presentation] Sr2Ir1-xRhxO4におけるアナポール秩序とFeSeにおけるFFLO超伝導 (2020)
  • Author(s): 笠原成
  • Organizer: 第14回物性科学領域横断研究会 (領域合同研究会)
• [Presentation] Bond directional anapole order in Sr2Ir1-xRhxO4 (2020)
  • Author(s): 笠原成
  • Organizer: 令和2年度 新学術領域研究「量子液晶の物性科学」領域研究会
• [Presentation] Sr2Ir1-xRhxO4の隠れた秩序状態における四回回転対称性の破れ (2019)
  • Author(s): 栗原遼, 村山陽奈子, 佐藤雄貴, 笠原成, 笠原裕一, 松田祐司, G Cao
  • Organizer: 日本物理学会 2019年秋季大会
• [Presentation] 高温熱ホール効果測定装置の開発 (2019)
  • Author(s): 井伊崇仁, 村山陽奈子, 栗原遼, 笠原成, 笠原裕一, 松田祐司
  • Organizer: 日本物理学会 2019年秋季大会
• [Presentation] FeSe における強磁場超伝導相：FFLO 状態 (2019)
  • Author(s): 笠原成
  • Organizer: 基研研究会 「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」
  • Invited
• [Presentation] Bond vs. Diagonal Nematicity in the Pseudogap Phase of High-Temperature Cuprate Superconductors (2019)
  • Author(s): Shigeru Kasahara
  • Organizer: Materials Research Meeting (MRM2019)
  • Int'l Joint Research / Invited
• [Presentation] FeSeにおけるFFLO超伝導 (2019)
  • Author(s): 笠原成
  • Organizer: 第27回渦糸物理ワークショップ
  • Invited
• [Presentation] Nematic Phase Transition at the Onset of Pseudogap in Cuprates (2018)
  • Author(s): Shigeru Kasahara
  • Organizer: Plasma 2019 Workshop, Jan. 18- 21, 2018. Univ. Central Florida, Orlando, FL, USA.
  • Int'l Joint Research / Invited
• [Presentation] Nematic transition at the onset of pseudogap in cuprates (2018)
  • Author(s): Shigeru Kasahara
  • Organizer: Energy and Environmental Applications (CMCEE-2018), Jul. 22-27, 2018, Suntec, Singapore.
  • Int'l Joint Research / Invited
• [Presentation] Nematic transition at the onset of pseudogap in cuprates (2018)
  • Author(s): Shigeru Kasahara
  • Organizer: International Workshop on Recent Progress in Superconductivity, Jul. 13-15, 2018, Peyongchang, Korea
  • Int'l Joint Research / Invited
• [Presentation] 銅酸化物高温超伝導体における新奇なネマティシティ (2018)
  • Author(s): 笠原成
  • Organizer: 京都大学基礎物理学研究所研究会「多自由度電子状態と電子相関が生み出す新奇超伝導の物理」, 2018 年5 月 7-9日, 京都大学, 京都市
  • Invited