Field-temperature phase-diagram of a high quality ruthenate superconductor

• Project/Area Number: 18K04715
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 26020:Inorganic materials and properties-related
• Research Institution: National Institute for Materials Science
• Principal Investigator: KIKUGAWA Naoki 国立研究開発法人物質・材料研究機構, エネルギー・環境材料研究拠点, 主幹研究員 (00442731)
• Project Period (FY): 2018-04-01 – 2023-03-31
• Project Status: Completed (Fiscal Year 2022)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2020: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2018: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
• Keywords: Sr2RuO4 / 超伝導 / 単結晶育成 / ルテニウム酸化物 / 高品質単結晶育成 / 相図 / 超伝導対称性 / 超伝導相図 / 高品質単結晶 / 磁場-温度相図 / 磁場ー温度相図

Outline of Final Research Achievements

To deepen the understanding of the anisotropic superconducting state in Sr2RuO4, we initially focused on the magnetic field-temperature phase diagram. First, we succeeded in growing high-quality and large-size single crystals of Sr2RuO4 by improving the growth conditions. Next, using the grown crystals, research on this material has reached a turning point in the past quarter of a century because the superconductivity of Sr2RuO4 is found to be an even parity rather than an odd parity. Combined with research under uniaxial pressure, for instance, we found a two-component superconducting order parameter and induced magnetic order by muon spin rotation experiments. In addition, for the magnetic field-temperature phase diagram, we were able to give a strong constraint on the ``new phase'' of the field-temperature phase diagram. These results should proceed to further research on this material.

Academic Significance and Societal Importance of the Research Achievements

Sr2RuO4 は常伝導状態がフェルミ液体的挙動を示し，擬2次元的な多バンドの電子構造(フェルミ面)も詳細にわかっていることから，数ある強相関電子系物質の中でも典型的な物質の一つと考えられている．一方で，このような電子状態が舞台となって発現する超伝導については，数多くの研究がなされ四半世紀が経過するものの，まだ系統的な理解には達していないのが現状である．超伝導転移温度は1.5ケルビンと低いものの，Sr2RuO4における異方的超伝導について矛盾なく理解することは，電子間の相互作用が強いことが本質である物質系で発現する異方的超伝導の普遍的枠組み構築に向けて貢献できる．

Research Products

• [Int'l Joint Research] Max Plank Institute (Dresden)(ドイツ)
• [Int'l Joint Research] University of St. Andrews(英国)
• [Int'l Joint Research] Max Plank Institute(ドイツ)
• [Int'l Joint Research] Max Plank Institute(ドイツ)
• [Int'l Joint Research] Univ. of St. Andrews(英国)
• [Int'l Joint Research] Max Plank Institute (Dresden)(ドイツ)
• [Int'l Joint Research] Max Plank Institute (Dresden)(ドイツ)
• [Journal Article] Bulk Physical Properties of a Magnetic Weyl Semimetal Candidate NdAlGe Grown by a Laser Floating-Zone Method (2023)
  • Author(s): Kikugawa Naoki、Terashima Taichi、Kato Takashi、Hayashi Momoko、Yamaguchi Hitoshi、Uji Shinya
  • Journal Title: Inorganics Volume: 11 Issue: 1 Pages: 20-20
  • DOI: 10.3390/inorganics11010020
  • Peer Reviewed / Open Access
• [Journal Article] Elastocaloric determination of the phase diagram of Sr2RuO4 (2022)
  • Author(s): Li You-Sheng、Garst Markus、Schmalian Jorg、Ghosh Sayak、Kikugawa Naoki、Sokolov Dmitry A.、Hicks Clifford W.、Jerzembeck Fabian、Ikeda Matthias S.、Hu Zhenhai、Ramshaw B. J.、Rost Andreas W.、Nicklas Michael、Mackenzie Andrew P.
  • Journal Title: Nature Volume: 607 Issue: 7918 Pages: 276-280
  • DOI: 10.1038/s41586-022-04820-z
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] The superconductivity of Sr2RuO4 under c-axis uniaxial stress (2022)
  • Author(s): Jerzembeck Fabian、Roising Henrik S.、Steppke Alexander、Rosner Helge、Sokolov Dmitry A.、Kikugawa Naoki、Scaffidi Thomas、Simon Steven H.、Mackenzie Andrew P.、Hicks Clifford W.
  • Journal Title: Nature Communications Volume: 13 Issue: 1
  • DOI: 10.1038/s41467-022-32177-4
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Tuning the Fermi liquid crossover in Sr2RuO4 with uniaxial stress (2022)
  • Author(s): Chronister A.、Zingl M.、Pustogow A.、Luo Yongkang、Sokolov D. A.、Jerzembeck F.、Kikugawa N.、Hicks C. W.、Mravlje J.、Bauer E. D.、Thompson J. D.、Mackenzie A. P.、Georges A.、Brown S. E.
  • Journal Title: npj Quantum Materials Volume: 7 Issue: 1
  • DOI: 10.1038/s41535-022-00519-6
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Strong increase in ultrasound attenuation below Tc in Sr2RuO4: Possible evidence for domains (2022)
  • Author(s): Ghosh Sayak、Kiely Thomas G.、Shekhter Arkady、Jerzembeck F.、Kikugawa N.、Sokolov Dmitry A.、Mackenzie A. P.、Ramshaw B. J.
  • Journal Title: Physical Review B Volume: 106 Issue: 2
  • DOI: 10.1103/physrevb.106.024520
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Propagating charge carrier plasmons in Sr2RuO4 (2022)
  • Author(s): Knupfer Martin、Jerzembeck Fabian、Kikugawa Naoki、Roth Friedrich、Fink Jorg
  • Journal Title: Physical Review B Volume: 106 Issue: 24
  • DOI: 10.1103/physrevb.106.l241103
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Single-Crystal Growth of Sr2RuO4 by the Floating-Zone Method Using an Infrared Image Furnace with Improved Halogen Lamps (2021)
  • Author(s): Naoki Kikugawa, Dmitry A. Sokolov, Tohru Nagasawa and Andrew P. Mackenzie
  • Journal Title: Crystals Volume: 11 Issue: 4 Pages: 392-392
  • DOI: 10.3390/cryst11040392
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Unsplit superconducting and time reversal symmetry breaking transitions in Sr2RuO4 under hydrostatic pressure and disorder (2021)
  • Author(s): Vadim Grinenko, Debarchan Das, Ritu Gupta, Bastian Zinkl, Naoki Kikugawa, Yoshiteru Maeno, Clifford W. Hicks, Hans-Henning Klauss, Manfred Sigrist & Rustem Khasanov
  • Journal Title: Nature Communications Volume: 12 Issue: 1 Pages: 737800-737800
  • DOI: 10.1038/s41467-021-24176-8
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Magnetocaloric effect in ferromagnetic 1/1 quasicrystal approximants Au64Al22R14 (R = Gd, Tb, and Dy) (2021)
  • Author(s): Kikugawa Naoki、Hiroto Takanobu、Ishikawa Asuka、Suzuki Shintaro、Sakurai Hiroya、Tamura Ryuji
  • Journal Title: Journal of Alloys and Compounds Volume: 882 Pages: 160669-160669
  • DOI: 10.1016/j.jallcom.2021.160669
  • Peer Reviewed
• [Journal Article] Evidence for even parity unconventional superconductivity in Sr2RuO4 (2021)
  • Author(s): Chronister Aaron、Pustogow Andrej、Kikugawa Naoki、Sokolov Dmitry A.、Jerzembeck Fabian、Hicks Clifford W.、Mackenzie Andrew P.、Bauer Eric D.、Brown Stuart E.
  • Journal Title: Proceedings of the National Academy of Sciences Volume: 118 Issue: 25
  • DOI: 10.1073/pnas.2025313118
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Split superconducting and time-reversal symmetry-breaking transitions in Sr2RuO4 under stress (2021)
  • Author(s): Grinenko Vadim、Ghosh Shreenanda、Sarkar Rajib、Orain Jean-Christophe、Nikitin Artem、Elender Matthias、Das Debarchan、Guguchia Zurab、Bruckner Felix、Barber Mark E.、Park Joonbum、Kikugawa Naoki、Sokolov Dmitry A.、et al.
  • Journal Title: Nature Physics Volume: 17 Issue: 6 Pages: 748-754
  • DOI: 10.1038/s41567-021-01182-7
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] High-sensitivity heat-capacity measurements on Sr2RuO4 under uniaxial pressure (2021)
  • Author(s): Li You-Sheng、Kikugawa Naoki、Sokolov Dmitry A.、Jerzembeck Fabian、Gibbs Alexandra S.、Maeno Yoshiteru、Hicks Clifford W.、Schmalian Jorg、Nicklas Michael、Mackenzie Andrew P.
  • Journal Title: Proceedings of the National Academy of Sciences Volume: 118 Issue: 10
  • DOI: 10.1073/pnas.2020492118
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Magnetoentropic Signatures of the Textured Metamagnetic Phase of an Antiferromagnetic Polar Metal: Ca3Ru2O7 (2021)
  • Author(s): Naoki Kikugawa, Dmitry A. Sokolov, Chanchal Sow, Yoshiteru Maeno, and Andrew Peter Mackenzie
  • Journal Title: Journal of the Physical Society of Japan Volume: 90 Issue: 10 Pages: 103704-103704
  • DOI: 10.7566/jpsj.90.103704
  • NAID: 40022710251
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Thermodynamic evidence for a two-component superconducting order parameter in Sr2RuO4 (2020)
  • Author(s): Ghosh Sayak、Shekhter Arkady、Jerzembeck F.、Kikugawa N.、Sokolov Dmitry A.、Brando Manuel、Mackenzie A. P.、Hicks Clifford W.、Ramshaw B. J.
  • Journal Title: Nature Physics Volume: 17 Issue: 2 Pages: 199-204
  • DOI: 10.1038/s41567-020-1032-4
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Electronically driven spin-reorientation transition of the correlated polar metal Ca3Ru2O7 (2020)
  • Author(s): Markovic Igor、Watson Matthew D.、Clark Oliver J.、Mazzola Federico、Abarca Morales Edgar、Hooley Chris A.、Rosner Helge、Polley Craig M.、Balasubramanian Thiagarajan、Mukherjee Saumya、Kikugawa Naoki、Sokolov Dmitry A.、Mackenzie Andrew P.、King Phil D. C.
  • Journal Title: Proceedings of the National Academy of Sciences Volume: 117 Issue: 27 Pages: 15524-15529
  • DOI: 10.1073/pnas.2003671117
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Fermi surface of PtCoO2 from quantum oscillations and electronic structure calculations (2020)
  • Author(s): Arnold F.、Naumann M.、Rosner H.、Kikugawa N.、Graf D.、Balicas L.、Terashima T.、Uji S.、Takatsu H.、Khim S.、Mackenzie A. P.、Hassinger E.
  • Journal Title: Physical Review B Volume: 101 Issue: 19
  • DOI: 10.1103/physrevb.101.195101
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Constraints on the superconducting order parameter in Sr2RuO4 from oxygen-17 nuclear magnetic resonance (2019)
  • Author(s): Pustogow A.、Luo Yongkang、Chronister A.、Su Y.-S.、Sokolov D. A.、Jerzembeck F.、Mackenzie A. P.、Hicks C. W.、Kikugawa N.、Raghu S.、Bauer E. D.、Brown S. E.
  • Journal Title: Nature Volume: 574 Issue: 7776 Pages: 72-75
  • DOI: 10.1038/s41586-019-1596-2
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Normal State O17 NMR Studies of Sr2RuO4 under Uniaxial Stress (2019)
  • Author(s): Luo Yongkang、Pustogow A.、Guzman P.、Dioguardi A.P.、Thomas S.M.、Ronning F.、Kikugawa N.、Sokolov D.A.、Jerzembeck F.、Mackenzie A.P.、Hicks C.W.、Bauer E.D.、Mazin I.I.、Brown S.E.
  • Journal Title: Physical Review X Volume: 9 Issue: 2
  • DOI: 10.1103/physrevx.9.021044
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Direct observation of a uniaxial stress-driven Lifshitz transition in Sr2RuO4 (2019)
  • Author(s): Sunko Veronika、Abarca Morales Edgar、Markovic Igor、Barber Mark E.、Milosavljevic Dijana、Mazzola Federico、Sokolov Dmitry A.、Kikugawa Naoki、Cacho Cephise、Dudin Pavel、Rosner Helge、Hicks Clifford W.、King Philip D. C.、Mackenzie Andrew P.
  • Journal Title: npj Quantum Materials Volume: 4 Issue: 1
  • DOI: 10.1038/s41535-019-0185-9
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Role of correlations in determining the Van Hove strain in Sr2RuO4 (2019)
  • Author(s): Barber Mark E.、Lechermann Frank、Streltsov Sergey V.、Skornyakov Sergey L.、Ghosh Sayak、Ramshaw B. J.、Kikugawa Naoki、Sokolov Dmitry A.、Mackenzie Andrew P.、Hicks Clifford W.、Mazin I. I.
  • Journal Title: Physical Review B Volume: 100 Issue: 24
  • DOI: 10.1103/physrevb.100.245139
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Metamagnetic texture in a polar antiferromagnet (2019)
  • Author(s): Sokolov D. A.、Kikugawa N.、Helm T.、Borrmann H.、Burkhardt U.、Cubitt R.、White J. S.、Ressouche E.、Bleuel M.、Kummer K.、Mackenzie A. P.、Roessler U. K.
  • Journal Title: Nature Physics Volume: 15 Issue: 7 Pages: 671-677
  • DOI: 10.1038/s41567-019-0501-0
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Improved Single-Crystal Growth of Sr2RuO4 (2019)
  • Author(s): Bobowski Jake、Kikugawa Naoki、Miyoshi Takuto、Suwa Haruki、Xu Han-shu、Yonezawa Shingo、Sokolov Dmitry、Mackenzie Andrew、Maeno Yoshiteru
  • Journal Title: Condensed Matter Volume: 4 Issue: 1 Pages: 6-6
  • DOI: 10.3390/condmat4010006
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Searching for gap zeros in Sr2RuO4 via field-angle-dependent specific-heat measurement (2018)
  • Author(s): Shunichiro Kittaka, Shota Nakamura, Toshiro Sakakibara, Naoki Kikugawa, Taichi Terashima, Shinya Uji, Dmitry A. Sokolov, Andrew P. Mackenzie, Koki Irie, Yasumasa Tsutsumi, Katsuhiro Suzuki, and Kazushige Machida
  • Journal Title: J. Phys. Soc. Jpn. Volume: 87 Issue: 9 Pages: 0937031-5
  • DOI: 10.7566/jpsj.87.093703
  • NAID: 210000134938
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Presentation] Magnetoentropic Signatures of the Textured Metamagnetic Phase of an Antiferromagnetic Polar Metal: Ca3Ru2O7 (2021)
  • Author(s): Naoki Kikugawa
  • Organizer: Oxide Superspin Workshop 2021
  • Int'l Joint Research / Invited
• [Presentation] 強磁性秩序を示す1/1近似結晶Au64Al22R14 (R = Gd, Tb, Dy) の磁気熱量効果 (2021)
  • Author(s): 菊川直樹，廣戸孝信，石川明日香，鈴木慎太郎，櫻井裕也，田村隆治
  • Organizer: 2021年日本応用物理学会秋季大会
• [Presentation] 熱力学量からみたSr2RuO4の上部臨界磁場近傍の超伝導状態 (2021)
  • Author(s): 河野洋平，橘高俊一郎，榊原俊郎，菊川直樹，寺嶋太一，宇治進也，D.A. Sokolov, 町田一成
  • Organizer: 日本物理学会(オンライン開催)
• [Presentation] 二層系層状ペロフスカイト構造を有するCa3Ru2O7の磁気熱量効果 (2019)
  • Author(s): 菊川直樹
  • Organizer: 日本磁気学会
• [Patent(Industrial Property Rights)] ルテニウム酸化物単結晶の製造方法及び製造装置 (2020)
  • Inventor(s): 菊川直樹，長澤亨
  • Industrial Property Rights Holder: 物質・材料研究機構、キヤノンマシナリー株式会社
  • Industrial Property Rights Type: 特許
  • Industrial Property Number: 2020-182989
  • Filing Date: 2020