Reentrant superconductivity driven by quantum tricritical fluctuations in URhGe: Evidence from Co 59 NMR in URh0.9Co0.1Ge

Y. Tokunaga, D. Aoki, H. Mayaffre, S. Krämer, M. H. Julien, C. Berthier, M. Horvatić, H. Sakai, S. Kambe, S. Araki

研究成果: Article査読

47 被引用数 (Scopus)

抄録

Our measurements of the Co59 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 HR≈13T, around which reentrant superconductivity (RSC) occurs in the ferromagnetic heavy fermion compound URhGe. We map out the strength of spin fluctuations in the (Hb,Hc) 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.

本文言語English
論文番号216401
ジャーナルPhysical review letters
114
21
DOI
出版ステータスPublished - 2015 5月 27

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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