EFFECT OF UNIAXIAL-STRESS ON THE SUPERCONDUCTING TRANSITION IN YBA2CU3O7

被引：202

作者：

WELP, U

GRIMSDITCH, M

FLESHLER, S

NESSLER, W

DOWNEY, J

CRABTREE, GW

GUIMPEL, J

机构：

[1] ARGONNE NATL LAB,SCI & TECHNOL CTR SUPERCONDUCT,ARGONNE,IL 60439

[2] UNIV CALIF SAN DIEGO,DEPT PHYS,LA JOLLA,CA 92093

来源：

PHYSICAL REVIEW LETTERS | 1992年 / 69卷 / 14期

关键词：

D O I：

10.1103/PhysRevLett.69.2130

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present the first direct measurements of T(c) as a function of uniaxial stress p(i) (i = a,b,c) along the crystal axes for an untwinned YBa2Cu3O7-delta single crystal. T(c) is linear in pi with slopes dT(c)/dp(a) = -2.0 +/- 0.2 K/GPa, dT(c)/dp(b) = +1.9 +/- 0.2 K/GPa, and dT(c)/dp(c) = -0.3 +/- 0.1 K/GPa. These results confirm predictions based on thermal expansion measurements [C. Meingast et al., Phys. Rev. Lett. 67, 1634 (1991)] and show that the small hydrostatic pressure dependence of T(c) in YBa2Cu3O7-delta is due to a cancellation of large and opposite effects in the a-b plane.

引用

页码：2130 / 2133

页数：4

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