Structural transition in the pyrochlore superconductor Cd2Re2O7 observed by Re nuclear quadrupole resonance

被引：20

作者：

Arai, K ^{[1
]}

Kobayashi, K ^{[1
]}

Kodama, K ^{[1
]}

Vyaselev, O ^{[1
]}

Takigawa, M ^{[1
]}

Hanawaa, M ^{[1
]}

Hiroi, Z ^{[1
]}

机构：

[1] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2002年 / 14卷 / 25期

关键词：

D O I：

10.1088/0953-8984/14/25/104

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We report results of nuclear quadrupole resonance (NQR) experiments on the Re sites in the pyrochlore superconductor Cd2Re2O7. A discontinuous change of the NQR spectrum was observed near T-s2 = 120 K, confirming the first-order structural transition in addition to the already known second-order transition at T-s1 = 200 K. The spin-lattice relaxation rate at the Re sites shows a steep increase above T-s2, in contrast to the reported results for the Cd sites, suggesting changes of orbital fluctuations.

引用

页码：L461 / L466

页数：6

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