Effect of hydrostatic pressure on the superconductivity in NaxCoO2•yH2O -: art. no. 132504

被引：36

作者：

Lorenz, B ^{[1
]}

Cmaidalka, J

Meng, RL

Chu, CW

机构：

[1] Univ Houston, Dept Phys, Houston, TX 77204 USA

[2] Univ Houston, TCSAM, Houston, TX 77204 USA

[3] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA

[4] Hong Kong Univ Sci & Technol, Hong Kong, Hong Kong, Peoples R China

来源：

PHYSICAL REVIEW B | 2003年 / 68卷 / 13期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevB.68.132504

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of hydrostatic pressure on the superconducting transition temperature of Na0.35CoO2.yH(2)O was investigated by ac susceptibility measurements up to 1.6 GPa. The pressure coefficient of T-c is negative and the dependence T-c(p) is nonlinear over the pressure range investigated. The magnitude of the average d ln T-c/dpapproximate to-0.07 GPa(-1) is comparable to the pressure coefficient of electron-doped high-T-c copper oxide superconductors with a similar value of T-c. Our results provide support to the assumption of two-dimensional superconductivity in Na0.35CoO2.yH(2)O, which is similar to the cuprate systems, and suggest that intercalation of larger molecules may lead to an enhancement of T-c.

引用

页数：3

共 10 条

[1] Electronic model for CoO2 layer based systems:: Chiral resonating valence bond metal and superconductivity -: art. no. 097003 [J].