Metamagnetism and superconducting transition in uranium-based novel heavy fermion superconductors

• Project/Area Number: 20K03854
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 13030:Magnetism, superconductivity and strongly correlated systems-related
• Research Institution: The University of Tokyo
• Principal Investigator: Miyake Atsushi 東京大学, 物性研究所, 助教 (10397763)
• Co-Investigator(Kenkyū-buntansha): 青木 大 東北大学, 金属材料研究所, 教授 (30359541)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Project Status: Completed (Fiscal Year 2022)
• Budget Amount: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2022: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2020: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
• Keywords: UTe2 / スピン三重項超伝導 / メタ磁性転移 / 磁気熱量効果 / キャパシタンス温度計 / 磁歪 / 価数転移 / 電子比熱係数 / 一次相転移 / 超伝導 / 強磁場 / メタ磁性

Outline of Research at the Start

2018年11月末に報告された重い電子系UTe2における超伝導は新たなスピン三重項超伝導として、大変注目を浴びている。さらに、磁場、圧力によって、今までに例のない複数の超伝導相が現れることが明らかになりつつある。強磁場中では磁化が急激に増大するメタ磁性転移が観測されており、磁場方向によって超伝導が増強されたり、抑制されることも分かってきた。世界的にも限られた60 T級の強磁場発生技術、世界最高峰の純良単結晶を用いて、メタ磁性と超伝導転移の関連性を明らかにし、スピン三重項超伝導の理解の深化を目指す。

Outline of Final Research Achievements

In this study, we investigated the properties of the spin-triplet superconductor UTe2 using a pulsed-high magnetic field to elucidate the superconducting properties and the mechanism of superconductivity, which changes significantly near the metamagnetic transition. In UTe2, superconductivity is either suppressed or induced at the metamagnetic transition, depending on the direction of the applied magnetic field. We found that the electronic specific heat coefficient decreases discontinuously in the former field direction and increases in the latter field direction by simultaneous magnetization and sample temperature measurements. Furthermore, we reveal an anisotropic lattice distortion associated with the metamagnetic transition. Based on the itinerant and localized duality picture of uranium 5f electrons, we propose that a valence change of uranium accompanies the metamagnetic transition.

Academic Significance and Societal Importance of the Research Achievements

スピン三重項超伝導は、量子コンピューターへの応用が期待されるトポロジカル超伝導の舞台として注目されている。さらに、磁場によってメタ磁性転移が起き、超伝導特性に大きく影響している。本研究を通じて、超伝導が消失する磁場方向では電子比熱係数が減少し、誘起される方向では増大することを明らかにし、メタ磁性転移はウランの価数転移であることを提案した。高磁場領域での物性が明らかになったことは、理論的な理解にも繋がる重要な成果である。さらに、このような成果はパルス強磁場中での実験手法の発展によって初めて成し得たものであり、今後の強磁場研究に大きく貢献できることが期待できる。

Research Products

• [Int'l Joint Research] CEA-Grenoble(フランス)
• [Int'l Joint Research] CEA-Grenoble/CNRS(フランス)
• [Int'l Joint Research] Karlsruhe Institute of Technology(ドイツ)
• [Int'l Joint Research] CEA-Grenoble(フランス)
• [Int'l Joint Research] Hochfeld-Magnetlabor Dresden (HLD-EMFL)(ドイツ)
• [Int'l Joint Research] Charles University(チェコ)
• [Journal Article] Ising-type quasi-one-dimensional ferromagnetism with anisotropic hybridization in UNi4P2 (2023)
  • Author(s): A. Maurya, A. Miyake, H. Kotegawa, Y. Shimizu, Y. J. Sato, A. Nakamura, D. Li, Y. Homma, F. Honda, M. Tokunaga, D. Aoki
  • Journal Title: Physical Review B Volume: 107 Issue: 8 Pages: 085142-1
  • DOI: 10.1103/physrevb.107.085142
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Change of superconducting character in UTe2 induced by magnetic field (2023)
  • Author(s): Kinjo K.、Fujibayashi H.、Kitagawa S.、Ishida K.、Tokunaga Y.、Sakai H.、Kambe S.、Nakamura A.、Shimizu Y.、Homma Y.、Li D. X.、Honda F.、Aoki D.、Hiraki K.、Kimata M.、Sasaki T.
  • Journal Title: Physical Review B Volume: 107 Issue: 6
  • DOI: 10.1103/physrevb.107.l060502
  • Peer Reviewed
• [Journal Article] Field-Induced Tuning of the Pairing State in a Superconductor (2023)
  • Author(s): Rosuel A.、Marcenat C.、Knebel G.、Klein T.、Pourret A.、Marquardt N.、Niu Q.、Rousseau S.、Demuer A.、Seyfarth G.、Lapertot G.、Aoki D.、Braithwaite D.、Flouquet J.、Brison J. P.
  • Journal Title: Physical Review X Volume: 13 Issue: 1 Pages: 011022-1
  • DOI: 10.1103/physrevx.13.011022
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Magnetovolume Effect on the First-Order Metamagnetic Transition in UTe2 (2022)
  • Author(s): Miyake Atsushi、Gen Masaki、Ikeda Akihiko、Miyake Kazumasa、Shimizu Yusei、Sato Yoshiki J.、Li Dexin、Nakamura Ai、Homma Yoshiya、Honda Fuminori、Flouquet Jacques、Tokunaga Masashi、Aoki Dai
  • Journal Title: Journal of the Physical Society of Japan Volume: 91 Issue: 6 Pages: 0637031-5
  • DOI: 10.7566/jpsj.91.063703
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Anomalous electromagnetic response in spin-triplet superconductor UTe2 (2022)
  • Author(s): Shimizu Yusei、Kittaka Shunichiro、Kono Yohei、Sakakibara Toshiro、Machida Kazushige、Nakamura Ai、Li Dexin、Homma Yoshiya、Sato Yoshiki J.、Miyake Atsushi、Yamashita Minoru、Aoki Dai
  • Journal Title: Physical Review B Volume: 106 Issue: 21 Pages: 2145251-6
  • DOI: 10.1103/physrevb.106.214525
  • Peer Reviewed / Open Access
• [Journal Article] First Observation of de Haas-van Alphen Effect and Fermi Surfaces in the Unconventional Superconductor UTe2 (2022)
  • Author(s): Aoki Dai、Sakai Hironori、Opletal Petr、Tokiwa Yoshifumi、Ishizuka Jun、Yanase Youichi、Harima Hisatomo、Nakamura Ai、Li Dexin、Homma Yoshiya、Shimizu Yusei、Knebel Georg、Flouquet Jacques、Haga Yoshinori
  • Journal Title: Journal of the Physical Society of Japan Volume: 91 Issue: 8 Pages: 0837041-5
  • DOI: 10.7566/jpsj.91.083704
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Unconventional superconductivity in UTe2 (2022)
  • Author(s): Aoki D、Brison J-P、Flouquet J、Ishida K、Knebel G、Tokunaga Y、Yanase Y
  • Journal Title: Journal of Physics: Condensed Matter Volume: 34 Issue: 24 Pages: 243002-243002
  • DOI: 10.1088/1361-648x/ac5863
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Superconducting Order Parameter in UTe2 Determined by Knight Shift Measurement (2022)
  • Author(s): Fujibayashi Hiroki、Nakamine Genki、Kinjo Katsuki、Kitagawa Shunsaku、Ishida Kenji、Tokunaga Yo、Sakai Hironori、Kambe Shinsaku、Nakamura Ai、Shimizu Yusei、Homma Yoshiya、Li Dexin、Honda Fuminori、Aoki Dai
  • Journal Title: Journal of the Physical Society of Japan Volume: 91 Issue: 4 Pages: 0437051-4
  • DOI: 10.7566/jpsj.91.043705
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Drastic change in magnetic anisotropy of UTe2 under pressure revealed by Te-125-NMR (2022)
  • Author(s): Kinjo Katsuki、Fujibayashi Hiroki、Nakamine Genki、Kitagawa Shunsaku、Ishida Kenji、Tokunaga Yo、Sakai Hironori、Kambe Shinsaku、Nakamura Ai、Shimizu Yusei、Homma Yoshiya、Li Dexin、Honda Fuminori、Aoki Dai
  • Journal Title: Physical Review B Volume: 105 Issue: 14
  • DOI: 10.1103/physrevb.105.l140502
  • Peer Reviewed / Open Access
• [Journal Article] Elastic Soft Mode and Electric Quadrupole Response in Excitonic Insulator Candidate (Ta0.952V0.048)2NiSe5: Contribution of Electro-Phonon Interaction (2022)
  • Author(s): R. Kurihara, , Y. Hirose, S. Sano, K. Mitsumoto, A. Miyake, M. Tokunaga, and R. Settai
  • Journal Title: Journal of Physical Society of Japan Volume: 91 Issue: 2 Pages: 1-7
  • DOI: 10.7566/jpsj.91.024601
  • Peer Reviewed
• [Journal Article] Slow Electronic Dynamics in the Paramagnetic State of UTe2 (2022)
  • Author(s): Tokunaga Yo、Sakai Hironori、Kambe Shinsaku、Haga Yoshinori、Tokiwa Yoshifumi、Opletal Petr、Fujibayashi Hiroki、Kinjo Katsuki、Kitagawa Shunsaku、Ishida Kenji、Nakamura Ai、Shimizu Yusei、Homma Yoshiya、Li Dexin、Honda Fuminori、Aoki Dai
  • Journal Title: Journal of the Physical Society of Japan Volume: 91 Issue: 2 Pages: 023707-023707
  • DOI: 10.7566/jpsj.91.023707
  • NAID: 210000159593
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Enhancement and Discontinuity of Effective Mass through the First-Order Metamagnetic Transition in UTe2 (2021)
  • Author(s): Miyake Atsushi、Shimizu Yusei、Sato Yoshiki J.、Li Dexin、Nakamura Ai、Homma Yoshiya、Honda Fuminori、Flouquet Jacques、Tokunaga Masashi、Aoki Dai
  • Journal Title: Journal of the Physical Society of Japan Volume: 90 Issue: 10 Pages: 103702-103702
  • DOI: 10.7566/jpsj.90.103702
  • NAID: 40022710243
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Field-Induced Superconductivity near the Superconducting Critical Pressure in UTe2 (2021)
  • Author(s): Aoki Dai、Kimata Motoi、Sato Yoshiki J.、Knebel Georg、Honda Fuminori、Nakamura Ai、Li Dexin、Homma Yoshiya、Shimizu Yusei、Knafo William、Braithwaite Daniel、Valiska Michal、Pourret Alexandre、Brison Jean-Pascal、Flouquet Jacques
  • Journal Title: Journal of the Physical Society of Japan Volume: 90 Issue: 7 Pages: 074705-074705
  • DOI: 10.7566/jpsj.90.074705
  • NAID: 40022620514
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Inhomogeneous Superconducting State Probed by 125Te NMR on UTe2 (2021)
  • Author(s): Nakamine Genki、Kinjo Katsuki、Kitagawa Shunsaku、Ishida Kenji、Tokunaga Yo、Sakai Hironori、Kambe Shinsaku、Nakamura Ai、Shimizu Yusei、Homma Yoshiya、Li Dexin、Honda Fuminori、Aoki Dai
  • Journal Title: Journal of the Physical Society of Japan Volume: 90 Issue: 6 Pages: 064709-064709
  • DOI: 10.7566/jpsj.90.064709
  • NAID: 40022591358
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Thermodynamic signatures of short-range magnetic correlations in UTe2 (2021)
  • Author(s): Willa Kristin、Hardy Frderic、Aoki Dai、Li Dexin、Wiecki Paul、Lapertot Gerard、Meingast Christoph
  • Journal Title: Physical Review B Volume: 104 Issue: 20 Pages: 205107-205107
  • DOI: 10.1103/physrevb.104.205107
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Feedback of Superconductivity on the Magnetic Excitation Spectrum of UTe2 (2021)
  • Author(s): Raymond Stephane、Knafo William、Knebel Georg、Kaneko Koji、Brison Jean-Pascal、Flouquet Jacques、Aoki Dai、Lapertot Gerard
  • Journal Title: Journal of the Physical Society of Japan Volume: 90 Issue: 11 Pages: 113706-113706
  • DOI: 10.7566/jpsj.90.113706
  • NAID: 210000159408
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Anomalous anisotropy of the lower critical field and Meissner effect in UTe2 (2021)
  • Author(s): Paulsen C.、Knebel G.、Lapertot G.、Braithwaite D.、Pourret A.、Aoki D.、Hardy F.、Flouquet J.、Brison J.-P.
  • Journal Title: Physical Review B Volume: 103 Issue: 18
  • DOI: 10.1103/physrevb.103.l180501
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Magnetic Properties under Pressure in Novel Spin-Triplet Superconductor UTe2 (2021)
  • Author(s): Li Dexin、Nakamura Ai、Honda Fuminori、Sato Yoshiki J.、Homma Yoshiya、Shimizu Yusei、Ishizuka Jun、Yanase Youichi、Knebel Georg、Flouquet Jacques、Aoki Dai
  • Journal Title: Journal of the Physical Society of Japan Volume: 90 Issue: 7 Pages: 073703-073703
  • DOI: 10.7566/jpsj.90.073703
  • NAID: 40022619562
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Core-Level Photoelectron Spectroscopy Study of UTe2 (2021)
  • Author(s): Fujimori Shin-ichi、Kawasaki Ikuto、Takeda Yukiharu、Yamagami Hiroshi、Nakamura Ai、Homma Yoshiya、Aoki Dai
  • Journal Title: Journal of the Physical Society of Japan Volume: 90 Issue: 1 Pages: 015002-015002
  • DOI: 10.7566/jpsj.90.015002
  • NAID: 210000158732
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Field-induced valence fluctuations in YbB12 (2021)
  • Author(s): Kurihara R.、Miyake A.、Tokunaga M.、Ikeda A.、Matsuda Y. H.、Miyata A.、Gorbunov D. I.、Nomura T.、Zherlitsyn S.、Wosnitza J.、Iga F.
  • Journal Title: Physical Review B Volume: 103 Issue: 11 Pages: 1-14
  • DOI: 10.1103/physrevb.103.115103
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Intriguing behavior of UCo1-xRhxGe ferromagnets in magnetic field along the b axis (2020)
  • Author(s): Pospsil Jiri、Haga Yoshinori、Miyake Atsushi、Kambe Shinsaku、Tokunaga Yo、Tokunaga Masashi、Yamamoto Etsuji、Proschek Petr、Volny Jiri、Sechovsky Vladimir
  • Journal Title: Physical Review B Volume: 102 Issue: 2
  • DOI: 10.1103/physrevb.102.024442
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Capacitive detection of magnetostriction, dielectric constant, and magneto-caloric effects in pulsed magnetic fields (2020)
  • Author(s): Miyake Atsushi、Mitamura Hiroyuki、Kawachi Shiro、Kimura Kenta、Kimura Tsuyoshi、Kihara Takumi、Tachibana Makoto、Tokunaga Masashi
  • Journal Title: Review of Scientific Instruments Volume: 91 Issue: 10 Pages: 105103-105103
  • DOI: 10.1063/5.0010753
  • Peer Reviewed
• [Journal Article] Strong magnetic anisotropy and unusual magnetic field reinforced phase in URhSn with a quasi-kagome structure (2020)
  • Author(s): Shimizu Yusei、Miyake Atsushi、Maurya Arvind、Honda Fuminori、Nakamura Ai、Sato Yoshiki J.、Li Dexin、Homma Yoshiya、Yokoyama Makoto、Tokunaga Yo、Tokunaga Masashi、Aoki Dai
  • Journal Title: Physical Review B Volume: 102 Issue: 13 Pages: 1344111-11
  • DOI: 10.1103/physrevb.102.134411
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Spin-Triplet Superconductivity in UTe2 and Ferromagnetic Superconductors (2020)
  • Author(s): Aoki Dai、Nakamura Ai、Honda Fuminori、Li DeXin、Homma Yoshiya、Shimizu Yusei、Sato Yoshiki J.、Knebel Georg、Brison Jean-Pascal、Pourret Alexandre、Braithwaite Daniel、Lapertot Gerard、Niu Qun、Valiska Michal、Harima Hisatomo、Flouquet Jacques
  • Journal Title: JPS Conference Proceedings Volume: 30 Pages: 011065-011065
  • DOI: 10.7566/jpscp.30.011065
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Anisotropy of the Upper Critical Field in the Heavy-Fermion Superconductor UTe2 (2020)
  • Author(s): Georg Knebel, Motoi Kimata, Michal Valiska, Fuminori Honda, DeXin Li, Daniel Braithwaite, Gerard Lapertot, William Knafo, Alexandre Pourret, Yoshiki J. Sato, Yusei Shimizu, Takumi Kihara, Jean-Pascal Brison, Jacques Flouquet, and Dai Aoki
  • Journal Title: Journal of the Physical Society of Japan Volume: 89 Issue: 5 Pages: 0537071-5
  • DOI: 10.7566/jpsj.89.053707
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Multiple Superconducting Phases and Unusual Enhancement of the Upper Critical Field in UTe2 (2020)
  • Author(s): Aoki Dai、Honda Fuminori、Knebel Georg、Braithwaite Daniel、Nakamura Ai、Li DeXin、Homma Yoshiya、Shimizu Yusei、Sato Yoshiki J.、Brison Jean-Pascal、Flouquet Jacques
  • Journal Title: Journal of the Physical Society of Japan Volume: 89 Issue: 5 Pages: 0537051-5
  • DOI: 10.7566/jpsj.89.053705
  • NAID: 210000158132
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Fermi-Surface Instability in the Heavy-Fermion Superconductor UTe2 (2020)
  • Author(s): Niu Q.、Knebel G.、Braithwaite D.、Aoki D.、Lapertot G.、Seyfarth G.、Brison J-P.、Flouquet J.、Pourret A.
  • Journal Title: Physical Review Letters Volume: 124 Issue: 8 Pages: 086601-086601
  • DOI: 10.1103/physrevlett.124.086601
  • Peer Reviewed / Int'l Joint Research
• [Presentation] de Haas-van Alphen effect and Fermi surfaces in spin-triplet superconductor UTe2 (2023)
  • Author(s): Dai Aoki
  • Organizer: APS March Meeting 2023
  • Int'l Joint Research
• [Presentation] Multiple superconducting phases in UTe2 (2022)
  • Author(s): Dai Aoki
  • Organizer: Unconventional superconductivity in the heavy fermion UTe2 (online)
  • Int'l Joint Research
• [Presentation] Crystal growth and spin triplet superconductivity in UTe2 (2022)
  • Author(s): Dai Aoki
  • Organizer: Polish Conference on Crystal Growth 2022
  • Int'l Joint Research
• [Presentation] Multiple Superconducting Phases and Fermi Surfaces in UTe2 (2022)
  • Author(s): Dai Aoki
  • Organizer: Dual Nature 2022
  • Int'l Joint Research
• [Presentation] Multiple Superconducting Phases and Field Induced Superconductivity in UTe2 (2022)
  • Author(s): Dai Aoki
  • Organizer: 13th International Conference on Materials and Mechanisms of Superconductivity & High Temperature Superconductors (M2S)
  • Int'l Joint Research / Invited
• [Presentation] First-order metamagnetic transition in UTe2 studied by magnetostriction measurements (2022)
  • Author(s): A. Miyake, M. Gen, A. Ikeda, K. Miyake, Y. Shimizu, Y. J. Sato, D. Li, A. Nakamura, Y. Homma, F. Honda, J. Flouquet, M. Tokunaga, and D. Aoki
  • Organizer: Strongly Correlated Electron Systems 2022 (SCES 2022)
  • Int'l Joint Research
• [Presentation] Electronic states and superconductivity in UTe2 (2022)
  • Author(s): Dai Aoki
  • Organizer: Strongly Correlated Electron Systems 2022 (SCES 2022)
  • Int'l Joint Research / Invited
• [Presentation] Development of Magnetic-Field-Insensitive Thermometer and Its Applications Used in a Pulsed-Magnetic Field (2022)
  • Author(s): A. Miyake, M. Gen, A. Ikeda, Y. Kinoshita, D. Aoki, and M. Tokunaga
  • Organizer: 29th International Conference on Low Temperature Physics (LT29)
  • Int'l Joint Research
• [Presentation] Multiple superconducting phases and field induced phenomena in novel spin-triplet superconductor UTe2 (2022)
  • Author(s): Dai Aoki
  • Organizer: The 29th international Conference on Low Temperature Physics (LT29)
  • Int'l Joint Research / Invited
• [Presentation] Magnetic-field effect on UTe2 and aperiodic crystals (2022)
  • Author(s): Atsushi Miyake
  • Organizer: GIMRT, REIMEI and IRN Aperiodic joint international workshop Superconductivity, Structural Complexity and Topology of UTe2 and Aperiodic Crystals
  • Int'l Joint Research / Invited
• [Presentation] Multiple superconducting phases and field induced phenomena in novel spin-triplet superconductor UTe2 (2022)
  • Author(s): Dai Aoki
  • Organizer: GIMRT, REIMEI and IRN Aperiodic joint international workshop Superconductivity, Structural Complexity and Topology of UTe2 and Aperiodic Crystals
  • Int'l Joint Research / Invited
• [Presentation] Development of the high-field measurements: Applications for the magnetic field-induced phenomena (2022)
  • Author(s): Atsushi Miyake
  • Organizer: Muroran Institute of Technology Rare Earth Workshop 2022 (REWS2022)
  • Int'l Joint Research / Invited
• [Presentation] UTe2のメタ磁性転移における磁気体積効果 (2022)
  • Author(s): 三宅厚志, 厳正輝, 池田暁彦, 三宅和正, 清水悠晴, 佐藤芳樹, 李徳新, 仲村愛, 本間佳哉, 本多史憲, Jacques Flouquet, 徳永将史, 青木大
  • Organizer: 日本物理学会 2022 年秋季大会
• [Presentation] Metamagnetic transition in UTe2 (2022)
  • Author(s): Atsushi Miyake
  • Organizer: Recent Topics in Low Temperature Physics
  • Int'l Joint Research
• [Presentation] Multiple superconducting phases and Fermi surfaces in UTe2 (2022)
  • Author(s): Dai Aoki
  • Organizer: Recent Topics in Low Temperature Physics
  • Int'l Joint Research
• [Presentation] パルス磁場中における同時測定技術の開発 (2022)
  • Author(s): 三宅厚志, 青木大, 渡辺義人, 厳正輝, 徳永祐介, 有馬孝尚, 徳永将史
  • Organizer: 日本物理学会第77回年次大会（2022年）
• [Presentation] 超高感度極低温磁化測定技術の開発とウラン系奇パリティ超伝導体の磁気特性 (2022)
  • Author(s): 清水悠晴, 橘高俊一郎, 河野洋平, 榊原俊郎, 仲村愛, 李徳新, 本間佳哉, 佐藤芳樹, 三宅厚志, 青木大
  • Organizer: 日本物理学会第77回年次大会（2022年）
• [Presentation] 磁場に依存しない温度計の開発によるウラン系超伝導体におけるメタ磁性転移と超伝導の研究 (2021)
  • Author(s): 三宅厚志
  • Organizer: 第3回強磁場フォーラムフロンティア奨励賞受賞記念講演
  • Invited
• [Presentation] Metamagnetism of Heavy Fermion Superconductor UTe2 (2021)
  • Author(s): Miyake Atsushi
  • Organizer: Materials Research Meeting (MRM) 2021
  • Invited
• [Presentation] UTe2のメタ磁性転移における有効質量の増大 (2021)
  • Author(s): 三宅厚志, 清水悠晴, 佐藤芳樹, 李徳新, 仲村愛, 本間佳哉, 本多史憲, Jacques Flouquet, 徳永将史, 青木大
  • Organizer: 日本物理学会2021年秋季大会
• [Presentation] Multiple Superconducting Phases and Field-Induced Superconductivity in UTe2 (2021)
  • Author(s): Dai Aoki
  • Organizer: The International Conference on Solid Compounds of Transition Elements
  • Invited
• [Presentation] Heavy fermion superconductivity: field induced superconductivity and crystal structure (2021)
  • Author(s): Dai Aoki
  • Organizer: IRN seminars
• [Presentation] Multiple superconducting phases and field induced phenomena in novel spin-triplet superconductor UTe2 (2021)
  • Author(s): Dai Aoki
  • Organizer: Dual Nature
• [Presentation] Multiple superconducting phases and field-induced superconductivity under pressure in UTe2 (2021)
  • Author(s): Dai Aoki
  • Organizer: SCES2020/2021
  • Invited
• [Presentation] Multiple superconducting phases and field induced phenomena in UTe2 (2021)
  • Author(s): Dai Aoki
  • Organizer: Seminar at Rice University
• [Presentation] Multiple superconducting phases and field induced phenomena in UTe2 (2021)
  • Author(s): Dai Aoki
  • Organizer: Chirality, Topology, and Unconventional Superconductivity in Sr2RuO4 and UTe2
• [Presentation] Magnetostriction measurements using a capacitance method (2021)
  • Author(s): Atsushi Miyake
  • Organizer: FBGひずみ技術交流会（FBG strain gauge meet up）
  • Int'l Joint Research
• [Presentation] Metamagnetic transition in heavy fermion superconductor UTe2 (2021)
  • Author(s): Atsushi Miyake
  • Organizer: The joint seminar of the DCMP and MGML, Charles University
  • Int'l Joint Research / Invited
• [Presentation] Multiple superconducting phases and field-induced phenomena in UTe2 (2021)
  • Author(s): Dai Aoki
  • Organizer: APS march meeting 2021
  • Int'l Joint Research / Invited
• [Presentation] 新奇スピン三重項超伝導体UTe2の磁場誘起超伝導 (2021)
  • Author(s): 青木大
  • Organizer: 日本物理学会年次大会
• [Presentation] パルス強磁場下磁化測定によるYbB12の磁場誘起絶縁体-金属転移の研究 (2020)
  • Author(s): 三宅厚志, 栗原綾佑, 池田暁彦, 広瀬雄介, 摂待力生, 金道浩一, 松田康弘, 徳永将史, 伊賀文俊
  • Organizer: 日本物理学会 2020年秋季大会
• [Presentation] パルス磁場下磁化、比熱測定によるメタ磁性転移の研究 (2020)
  • Author(s): 三宅厚志
  • Organizer: 日本物理学会 2020年秋季大会（一般シンポジウム）
  • Invited
• [Presentation] Study of metamagnetic transitions in UTe2 via magnetization and specific heat in pulsed-fields (2020)
  • Author(s): Atsushi Miyake
  • Organizer: UTe2 online workshop
  • Int'l Joint Research
• [Presentation] ウラン化合物におけるメタ磁性現象と超伝導 (2020)
  • Author(s): 三宅厚志
  • Organizer: 第27回 みちのく磁性談話会
  • Invited
• [Presentation] Metamagnetic transition in a heavy fermion superconductor UTe2 (2020)
  • Author(s): Atsushi Miyake
  • Organizer: Asia-Pacific Conference on Research in High Magnetic Fields & KINKEN Materials Science School 2020 for Young Scientists
  • Int'l Joint Research / Invited
• [Presentation] Fermi surface properties and heavy fermion superconductivity in Np115 systems and related materials (2020)
  • Author(s): Dai Aoki
  • Organizer: 20 years of the 115's: past, present, and future
  • Int'l Joint Research / Invited
• [Presentation] Field induced phenomena and multiple superconducting phases in novel spin-triplet superconductor UTe2 (2020)
  • Author(s): Dai Aoki
  • Organizer: QMC Colloquium at UMD
  • Int'l Joint Research
• [Presentation] Field-reentrant and multiple superconducting phases in novel spin-triplet superconductor UTe2 (2020)
  • Author(s): Dai Aoki
  • Organizer: IRN-APERIODIC
  • Int'l Joint Research / Invited
• [Presentation] Reentrant superconductivity and multiple superconducting phases in UTe2 (2020)
  • Author(s): Dai Aoki
  • Organizer: SCES 2020 Plenary Colloquium
  • Int'l Joint Research / Invited
• [Presentation] Multiple SC phases for H || a, b, c-axes (2020)
  • Author(s): Dai Aoki
  • Organizer: UTe2 online workshop
  • Int'l Joint Research
• [Presentation] 新奇スピン三重項超伝導体UTe2の磁場誘起超伝導 (2020)
  • Author(s): 青木大
  • Organizer: 日本物理学会秋季大会（JPSJフレンドシップミーティング）
• [Presentation] UTe2の基礎物性 (2020)
  • Author(s): 青木大
  • Organizer: 日本物理学会 2020年秋季大会（一般シンポジウム）
  • Invited
• [Presentation] Field reentrant superconductivity and multiple phases in UTe2 (2020)
  • Author(s): Dai Aoki
  • Organizer: Condensed Matter Physics in All the Cities: Online 2020
  • Int'l Joint Research / Invited
• [Presentation] UTe2のスピン三重項超伝導と磁場誘起現象 (2020)
  • Author(s): 青木大
  • Organizer: 強磁場セミナー（物性研）
• [Presentation] New Uranium-Based Superconductor: UTe2 (2020)
  • Author(s): Dai Aoki
  • Organizer: "Virtual Theoretical & Experimental Magnetism Meeting (vTEMM) 2020 and UK-Japan Workshop on Strongly Correlated Electron Systems"
  • Int'l Joint Research / Invited
• [Remarks] 高精度磁歪測定でUTe2のメタ磁性転移の正体に迫る
  • URL: https://www.issp.u-tokyo.ac.jp/maincontents/news2.html?pid=15850
• [Remarks] 三宅厚志 助教（徳永研）が強磁場フォーラムフロンティア奨励賞を受賞
  • URL: https://www.issp.u-tokyo.ac.jp/maincontents/news2.html?pid=14516