Rchr
J-GLOBAL ID：200901046501574153
Update date: Nov. 14, 2024
Tokunaga Yo
トクナガ ヨウ | Tokunaga Yo
Affiliation and department：
Job title：
Group Leader
Research field (1)：
Magnetism, superconductivity, and strongly correlated systems
Research keywords (6)：
Ferromagnetic Superconductors
, heavy Electron Systems
, Strongly Correlated Electron Systems
, Superconductivity
, Magnetism
, NMR
Research theme for competitive and other funds (20)：
- 2023 - 2027 重い電子系の複合自由度を用いた新奇トポロジカル量子相の探索と電子構造の解明
- 2022 - 2027 Physics of strongly-correlated topological spin-triplet superconductivity with uranium atom
- 2020 - 2026 Clarifying the mechanism of spin-triplet superconductivity in uranium compounds
- 2020 - 2024 Spin-triplet superconductivity on Uranium-based compounds
- 2019 - 2022 Microscopic investigation of ferromagnetic superconductivity under uniaxial stress
- 2015 - 2020 Understanding of the Mechanism of Superconductivity and Search for a Novel Superconducting State in Uranium Heavy-Fermion Compounds
- 2016 - 2018 Microscopic investigation of the mechanism of field-induced reentrant superconductivity in itinerant ferromagnetic superconductors(Fostering Joint International Research)
- 2014 - 2017 Microscopic study on magnetically responsive electronic state in uranium chalcogenides
- 2014 - 2017 Microscopic investigation of field-induced superconducting mechanism in itinerant ferromagnetic superconductors
- 2011 - 2014 NMR study of aging process of self-radiation damage in minor actinide dioxides
- 2010 - 2012 Detection and control of spin conduction by ferromagnetic nuclear magnetic resonance.
- 2008 - 2012 Orderings and fluctuations originated from multipole degrees of freedom
- 2009 - 2011 Single crystal growth of Ce-T-Al(T=transition metals) and development of physical property measurements by GM cryocooler
- 2009 - 2010 NMR study of uranium-based ferromagnetic superconductors
- 2006 - 2007 アクチノイド充填スクッテルダイト化合物の新しい展開
- 2006 - 2007 ネプツニウム酸化物における新奇な八極子秩序の微視的研究
- 2004 - 2005 ウランを含むスクッテルダイト化合物の物質探索と物性
- 2002 - 2005 Study of magnetism and superconductivity in trans uranium compounds
- 2000 - 2001 銅酸化物高温超伝導体の発現機構と擬ギャップ現象の解明
- 1998 - 1999 高温超伝導体の磁気励起と超伝導機構の解明
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Papers (260)：
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Kitagawa Shunsaku*, Tokunaga Yo, Sakai Hironori, Kambe Shinsaku, 11 of others*. Clear reduction in spin susceptibility and superconducting spin rotation for $H$ $|$$|$ $a$ in the early-stage sample of spin-triplet superconductor UTe$_2. Journal of the Physical Society of Japan. 2024. 93. 12. 123701\_1-123701\_5
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Y. Tokiwa, P. Opletal, H. Sakai, S. Kambe, E. Yamamoto, M. Kimata, S. Awaji, T. Sasaki, D. Aoki, Y. Haga, et al. Reinforcement of superconductivity by quantum critical fluctuations of metamagnetism in UTe2. Physical Review B. 2024. 109. L140502-1-L140502-6
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Tokunaga Yo, Sakai Hironori, Kambe Shinsaku, Opletal P, Tokiwa Yoshifumi, Haga Yoshinori, Kitagawa Shunsaku, Ishida Kenji, Aoki Dai, Knebel Georg, et al. Longitudinal spin fluctuations driving field-reinforced superconductivity in UTe$_2. Physical Review Letters. 2023. 131. 22. 226503\_1-226503\_7
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Y. Tokiwa, H. Sakai, S. Kambe, P. Opletal, E. Yamamoto, M. Kimata, S. Awaji, T. Sasaki, Y. Yanase, Y. Haga, et al. Anomalous vortex dynamics in the spin-triplet superconductor UTe2. Physical Review B. 2023. 108. 14. 144502
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T. Kitazawa, Y. Ikeda, T. Sakakibara, A. Matsuo, Y. Shimizu, Y. Tokunaga, Y. Haga, K. Kindo, Y. Nambu, K. Ikeuchi, et al. Observation of field-induced single-ion magnetic anisotropy in a multiorbital Kondo alloy (Lu, Yb)Rh2Zn20. Physical Review B. 2023. 108. 8
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MISC (223)：
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松村拓輝, 高橋侑希, 金城克樹, 北川俊作, 石田憲二, 徳永陽, 酒井宏典, 神戸振作, 仲村愛, 清水悠晴, et al. Pressure NMR study on ultra-clean single crystal of the spin-triplet superconductor UTe2. 日本物理学会講演概要集(CD-ROM). 2024. 79. 1
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中西宏介, 高橋侑希, 松村拓輝, 藤林裕己, 金城克樹, 金城克樹, 北川俊作, 石田憲二, 徳永陽, 酒井宏典, et al. Re-measurement of a-axis component of Knight shift in spin-triplet superconductor UTe2. 日本物理学会講演概要集(CD-ROM). 2024. 79. 1
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Tokunaga Yo, Sakai Hironori, Kitagawa Shunsaku*, Ishida Kenji*. Physics of spin-triplet superconductivity in uranium compounds studied by NMR. Nihon Butsuri Gakkai-Shi. 2023. 78. 5. 267-272
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松村拓輝, 高橋侑希, 藤林裕己, 金城克樹, 金城克樹, 北川俊作, 石田憲二, 徳永陽, 酒井宏典, 神戸振作, et al. Superconducting gap structure of ultra-clean single crystal of the spin-triplet superconductor UTe2 revealed by NMR measurements. 日本物理学会講演概要集(CD-ROM). 2023. 78. 2
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常盤欣文, OPLETAL Petr, 酒井宏典, 久保勝規, 神戸振作, 山本悦嗣, 木俣基, 淡路智, 佐々木孝彦, 青木大, et al. Induced first-order transition inside superconducting state by metamagnetism in an easy-axis magnetic field on UTe2. 日本物理学会講演概要集(CD-ROM). 2023. 78. 1
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Lectures and oral presentations (244)：
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NMR study of spin fluctuations and superconductivity in UTe$_2$
(SUPERMAX; International Workshop on Superconductivity and Magnetism in f-Electrons Quantum Materials under Extreme Conditions)
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Magnetism and superconductivity in UTe$_2$ under strong magnetic fields
(東北大学金属材料研究所大洗・アルファ合同研究会)
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Magnetism in uranium-based van der Waals compound UTe$_3$
(日本物理学会第79回年次大会(2024年))
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High-field NMR study of spin fluctuations and superconductivity in UTe$_2$
(日本物理学会第79回年次大会(2024年))
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Basic physical properties of single crystalline HoTr$_2$Zn$_{20}$ (Tr = Co, Rh, Ir)
(日本物理学会第79回年次大会(2024年))
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Education (3)：
- 1996 - 1999 Osaka University
- 1994 - 1996 Osaka University
- 1990 - 1994 Osaka University School of Engineering Science Direct Affiliates
Professional career (2)：
- a Doctor of Science (Osaka University)
- Master of Engineering (Osaka University)
Work history (9)：
- 2023/07 - 現在 Japan Atomic Energy Agency Senior Principal Researcher
- 2022/04 - 現在 Japan Atomic Energy Agency Advanced Science Research Center, Strongly Correlated Actinide Science Research Group, Group Leader
- 2015/04 - 2023/06 JAEA Principal Researcher
- 2019/04 - 2019/07 Université Grenoble Alpes Invited Professor
- 2012/07 - 2015/03 JAEA Principal Researcher
- 2007/04 - 2012/06 JAEA Assistant Principal Researcher
- 2005/10 - 2007/06 JAEA Researcher
- 2002/04 - 2005/09 JAERI Researcher
- 2000/04 - 2002/03 Grenoble High Magnetic Field Lab. 学振特別研究員(PD)
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Awards (13)：
- 2024/04 - The Physical Society of Japan JPSJ 2023 Highly Cited Article Superconducting Order Parameter in UTe2 Determined by Knight Shift Measurement
- 2024/04 - The Physical Society of Japan JPSJ 2023 Highly Cited Article Slow Electronic Dynamics in the Paramagnetic State of UTe2
- 2023/11 - American Physical Society PRL Editors' Suggestion Longitudinal Spin Fluctuations Driving Field-Reinforced Superconductivity in UTe2
- 2022/04 - American Physical Society PRB Editors' Suggestion Drastic change in magnetic anisotropy of UTe2 under pressure revealed by 125Te-NMR
- 2021/05 - The Physical Society of Japan JPSJ 2020 Highly Cited Article "Superconducting Properties of Heavy Fermion UTe2 Revealed by 125Te-nuclear Magnetic Resonance"
- 2021/05 - The Physical Society of Japan JPSJ 2020 Highly Cited Article "125Te-NMR Study on a Single Crystal of Heavy Fermion Superconductor UTe2"
- 2019/10 - The Physical Society of Japan JPSJ Papers of Editors' Choice "Superconducting Properties of Heavy Fermion UTe2 Revealed by 125Te-Nuclear Magnetic Resonance"
- 2016/10 - 日本原子力研究開発機構 研究開発功績賞 強い磁場でよみがえる超伝導のしくみを解明
- 2016/06 - The Physical Society of Japan JPSJ Editors' Choice "No detectable change of in-plane 29Si Knight shift in the superconducting state of URu2Si2"
- 2015/05 - The American Physical Society Physical Review Letters Editors' Suggestion "Reentrant superconductivity driven by quantum tricritical fluctuations in URhGe: Evidence from 59Co NMR in URh0.9Co0.1Ge"
- 2012/10 - 日本原子力研究開発機構 理事長奨励賞 核磁気共鳴法を用いたMA含有酸化物における自己照射損傷プロセスの微視的研究
- 2010 - 日本物理学会 第4回日本物理学会若手奨励賞 超ウラン化合物における多極子秩序の微視的観測
- 2007 - 日本原子力研究開発機構 研究開発功績賞 核磁気共鳴法によるアクチノイド酸化物の電子物性の解明
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Association Membership(s) (2)：
日本物理学会
, Physical Society of Japan
