Magnetic-Field-Induced Enhancements of Nuclear Spin-Lattice Relaxation Rates in the Heavy-Fermion Superconductor CeCoIn5 Using 59Co Nuclear Magnetic Resonance

被引：18

作者：

Sakai, H. ^{[1
,2
]}

Brown, S. E. ^{[1
,3
]}

Baek, S. -H. ^{[1
]}

Ronning, F. ^{[1
]}

Bauer, E. D. ^{[1
]}

Thompson, J. D. ^{[1
]}

机构：

[1] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

[2] Japan Atom Energy Agcy, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan

[3] Univ Calif Los Angeles, Dept Phys, Los Angeles, CA 90024 USA

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 107卷 / 13期

基金：

美国国家科学基金会;

关键词：

FLUCTUATIONS; INSTABILITY; SYSTEMS;

D O I：

10.1103/PhysRevLett.107.137001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Co-59 nuclear spin-lattice relaxation has been measured for the heavy-fermion superconductor CeCoIn5 in a range of applied fields directed parallel to the c axis. An enhanced normal-state relaxation rate, observed at low temperatures and fields just above H-c2(0), is taken as a direct measure of the dynamical susceptibility and provides microscopic evidence for an antiferromagnetic instability. The results are well described using the self-consistent renormalized theory for two-dimensional antiferromagnetic spin fluctuations, and parameters obtained in the analysis are applied to previously reported specific heat and thermal expansion data with good agreement.

引用

页数：5