Ru-101 NQR study of antiferromagnetic superconductor URu2Si2

被引：9

作者：

Matsuda, K ^{[1
]}

Kohori, Y ^{[1
]}

Kohara, T ^{[1
]}

机构：

[1] HIMEJI INST TECHNOL, FAC SCI, DEPT MAT SCI, HIMEJI, HYOGO 67812, JAPAN

来源：

PHYSICA B-CONDENSED MATTER | 1997年 / 230卷

关键词：

URu2Si2; superconductivity; NQR;

D O I：

10.1016/S0921-4526(96)00718-1

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We have carried out Ru-101 NQR measurement of URu2Si2 in zero magnetic field in the temperature (T) range from 0.16 to 130 K. The electric quadrupole interaction parameters of Ru-101 were determined to be nu(Q) = 5.72 MHz and eta = 0 at 1.3 K. Although URu2Si2 is in the antiferromagnetic (AF) state below 17.5 K, no broadening of NQR line was observed, indicating that transferred hyperfine field from U moments is cancelled at Ru site. The nuclear spin-lattice relaxation rate (1/T-1) decreases drastically below 17.5 K associated with AF ordering. In the superconducting state, 1/T-1 has no coherence peak just below T-C = 1.2 K, and decreases in proportion to T-3 With no deviation down to 0.2 K, which shows the existence of line nodes in the superconducting energy gap.

引用

页码：351 / 353

页数：3

共 4 条

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