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

被引：55

作者：

Tokunaga, Y. ^{[1
]}

Aoki, D. ^{[2
,3
]}

Mayaffre, H. ^{[4
]}

Kraemer, S. ^{[4
]}

Julien, M. -H. ^{[4
]}

Berthier, C. ^{[4
]}

Horvatic, M. ^{[4
]}

Sakai, H. ^{[1
]}

Kambe, S. ^{[1
]}

Araki, S. ^{[5
]}

机构：

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

[2] CEA Grenoble UJF, INAC SPSMS, F-38054 Grenoble, France

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

[4] CNRS UJF UPS INSA, LNCMI, UPR 3228, F-38042 Grenoble, France

[5] Okayama Univ, Dept Phys, Okayama 7008530, Japan

来源：

PHYSICAL REVIEW LETTERS | 2015年 / 114卷 / 21期

基金：

欧洲研究理事会; 日本学术振兴会;

关键词：

FERROMAGNETIC ORDER; FIELD;

D O I：

10.1103/PhysRevLett.114.216401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Our measurements of the Co-59 NMR spin-spin relaxation in URh0.9Co0.1Ge reveal a divergence of electronic spin fluctuations in the vicinity of the field-induced quantum critical point at H-R approximate to 13 T, around which reentrant superconductivity (RSC) occurs in the ferromagnetic heavy fermion compound URhGe. We map out the strength of spin fluctuations in the (H-b; H-c) plane of magnetic field components and show that critical fluctuations develop in the same limited region near the field HR as that where RSC is observed. This strongly suggests these quantum fluctuations as the pairing glue responsible for the RSC. The fluctuations observed are characteristic of a tricritical point, followed by a phase bifurcation toward quantum critical end points.

引用

页数：5