Nuclear quadrupole resonance study of heavy fermion superconductors

被引：2
|
作者：
Kohori, Y [1 ]
Matsuda, K [1 ]
Kohara, T [1 ]
机构：
[1] Himeji Inst Technol, Fac Sci, Dept Mat Sci, Kamigori, Hyogo 6781297, Japan
来源：
HYPERFINE INTERACTIONS | 1999年 / 120卷 / 1-8期
关键词：
CeRu; Superconducting State; Nuclear Quadrupole Resonance; Superconducting Transition Temperature; Heavy Fermion System;
D O I：
10.1023/A:1017070127909
中图分类号：
O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];
学科分类号：
070203 ; 070304 ; 081704 ; 1406 ;
摘要：
By using nuclear quadrupole resonance (NQR), nuclear spin-lattice relaxation rate 1/T-1 of the heavy fermion superconductors (URu2Si2, UPd2Al3, CeRu2) has been measured. The NQR measurement requires no external field, and is especially suitable for Pd-105 and Ru-101, which have very small nuclear gyromagnetic ratios and large electric quadrupole moments. In URu2Si2 and UPd2Al3, the absence of the Hebel-Slichter coherence peak just below the superconducting transition temperature T-C and the power law temperature dependence (T-3) in the superconducting state has shown appearance of anisotropic non-s-wave superconductivity. On the contrary, an exponential temperature dependence of 1/T-1 was observed in CeRu2, indicating the superconductivity to be conventional s-wave.
引用
收藏
页码：503 / 506
页数：4
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