Thermodynamic signatures of short-range magnetic correlations in UTe2

被引：22

作者：

Willa, Kristin ^{[1
]}

Hardy, Frederic ^{[1
]}

Aoki, Dai ^{[2
,3
]}

Li, Dexin ^{[2
]}

Wiecki, Paul ^{[1
]}

Lapertot, Gerard ^{[3
]}

Meingast, Christoph ^{[1
]}

机构：

[1] Karlsruhe Inst Technol, Inst Quantum Mat & Technol, D-76021 Karlsruhe, Germany

[2] Tohoku Univ, Inst Mat Res, Ibaraki 3111313, Japan

[3] Univ Grenoble Alpes, CEA, Grenoble INP, IRIG,PHELIQS, F-38000 Grenoble, France

来源：

PHYSICAL REVIEW B | 2021年 / 104卷 / 20期

基金：

瑞士国家科学基金会;

关键词：

Compendex;

D O I：

10.1103/PhysRevB.104.205107

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The normal state out of which unconventional superconductivity in UTe2 emerges is studied in detail using a variety of thermodynamic and transport probes. Clear evidence for a broad Schottky-like anomaly with roughly R ln(2) entropy around T* approximate to 12 K is observed in all measured quantities. Comparison with high magnetic field transport data allows the construction of an H-T phase diagram resembling that of the ferromagnetic superconductor URhGe. The low-field electronic Gruneisen parameter of T* and that of the metamagnetic transition at Hm approximate to 35 T are comparable pointing to a common origin of both phenomena. Enhanced Wilson and Korringa ratios suggest that the existence of short-range ferromagnetic fluctuations cannot be ruled out.

引用

页数：6

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