Reinforcement of superconductivity by quantum critical fluctuations of metamagnetism in UTe2

被引：6

作者：

Tokiwa, Y. ^{[1
]}

Opletal, P. ^{[1
]}

Sakai, H. ^{[1
]}

Kambe, S. ^{[1
]}

Yamamoto, E. ^{[1
]}

Kimata, M. ^{[2
]}

Awaji, S. ^{[2
]}

Sasaki, T. ^{[2
]}

Aoki, D. ^{[3
]}

Haga, Y. ^{[1
]}

Tokunaga, Y. ^{[1
]}

机构：

[1] Japan Atom Energy Agcy, ASRC, Tokai, Ibaraki 3191195, Japan

[2] Tohoku Univ, IMR, Sendai, Miyagi 9808577, Japan

[3] Tohoku Univ, IMR, Ibaraki 3111313, Japan

来源：

PHYSICAL REVIEW B | 2024年 / 109卷 / 14期

关键词：

Entropy - Magnetic fields - Superconducting transition temperature;

D O I：

10.1103/PhysRevB.109.L140502

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The normal -conducting state of the superconductor UTe2 is studied by entropy analysis for magnetic fields along the b axis, obtained from magnetization using the relation ( 8 M /8 T )( B )= ( 8 S /8 B )( T) . We observe a strong increase in entropy with magnetic field due to metamagnetic (MM) fluctuations (spatially uniform, Q = 0). The field dependence is well described by the Hertz-Millis-Moriya theory for quantum criticality of itinerant MM. Notably, the lower bound of the quantum -critical region coincides well with the position of the minimum in the superconducting transition temperature T-c ( B ). Hence, our results suggest that Q = 0 fluctuations reinforce the superconductivity.

引用

页数：6

共 60 条

[51] Reentrant Superconductivity Driven by Quantum Tricritical Fluctuations in URhGe: Evidence from 59Co NMR in URh0.9Co0.1Ge [J].

Tokunaga, Y. ;

Aoki, D. ;

Mayaffre, H. ;

Kraemer, S. ;

Julien, M. -H. ;

Berthier, C. ;

Horvatic, M. ;

Sakai, H. ;

Kambe, S. ;

Araki, S. .

PHYSICAL REVIEW LETTERS, 2015, 114 (21)

[52] Slow Electronic Dynamics in the Paramagnetic State of UTe2 [J].

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 OF THE PHYSICAL SOCIETY OF JAPAN, 2022, 91 (02)

[53] 125Te-NMR Study on a Single Crystal of Heavy Fermion Superconductor UTe2 [J].

Tokunaga, Yo ;

Sakai, Hironori ;

Kambe, Shinsaku ;

Hattori, Taisuke ;

Higa, Nonoka ;

Nakamine, Genki ;

Kitagawa, Shunsaku ;

Ishida, Kenji ;

Nakamura, Ai ;

Shimizu, Yusei ;

Homma, Yoshiya ;

Li, DeXin ;

Honda, Fuminori ;

Aoki, Dai .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2019, 88 (07)

[54] Universal signatures of the metamagnetic quantum critical endpoint: Application to CeRu2Si2 [J].

Weickert, Franziska ;

Brando, Manuel ;

Steglich, Frank ;

Gegenwart, Philipp ;

Garst, Markus .

PHYSICAL REVIEW B, 2010, 81 (13)

[55] Thermodynamic signatures of short-range magnetic correlations in UTe2 [J].

Willa, Kristin ;

Hardy, Frederic ;

Aoki, Dai ;

Li, Dexin ;

Wiecki, Paul ;

Lapertot, Gerard ;

Meingast, Christoph .

PHYSICAL REVIEW B, 2021, 104 (20)

[56] Entropy accumulation near quantum critical points: effects beyond hyperscaling [J].

Wu, Jianda ;

Zhu, Lijun ;

Si, Qimiao .

INTERNATIONAL CONFERENCE ON STRONGLY CORRELATED ELECTRON SYSTEMS (SCES 2010), 2011, 273

[57]

Wu Z, 2024, Arxiv, DOI arXiv:2305.19033

[58] Quasi-Two-Dimensional Fermi Surfaces and Unitary Spin-Triplet Pairing in the Heavy Fermion Superconductor UTe2 [J].

Xu, Yuanji ;

Sheng, Yutao ;

Yang, Yi-feng .

PHYSICAL REVIEW LETTERS, 2019, 123 (21)

[59] Quantum criticality in itinerant metamagnets [J].

Zacharias, Mario ;

Garst, Markus .

PHYSICAL REVIEW B, 2013, 87 (07)

[60] Universally diverging Gruneisen parameter and the magnetocaloric effect close to quantum critical points [J].

Zhu, LJ ;

Garst, M ;

Rosch, A ;

Si, QM .

PHYSICAL REVIEW LETTERS, 2003, 91 (06)

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