High-pressure study on the superconducting pyrochlore oxide Cd2Re2O7

被引：31

作者：

Hiroi, Z ^{[1
]}

Yamauchi, T ^{[1
]}

Yamada, T ^{[1
]}

Hanawa, M ^{[1
]}

Ohishi, Y ^{[1
]}

Shimomura, O ^{[1
]}

Abliz, M ^{[1
]}

Hedo, M ^{[1
]}

Uwatoko, Y ^{[1
]}

机构：

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

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2002年 / 71卷 / 06期

关键词：

pyrochlore oxide; Cd2Re2O7; superconductivity; phase transition; high pressure; x-ray diffraction; electrical resistivity;

D O I：

10.1143/JPSJ.71.1553

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Superconducting and structural phase transitions in a pyrochlore oxide Cd2Re2O7 are studied under high pressure by x-ray diffraction and electrical resistivity measurements. A rich P-T phase diagram is obtained, which contains at least two phases with the ideal and slightly distorted pyrochlore structures. It is found that the transition between them is suppressed with increasing pressure and finally disappears at a critical pressure P-c = 3.5 GPa. Remarkable enhancements in the residual resistivity as well as the coefficient A of the AT(2) term in the resistivity are found around the critical pressure. Superconductivity is detected only for the phase with the structural distortion.

引用

页码：1553 / 1557

页数：5

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