d-wave scaling relations in the mixed-state specific heat of YBa2Cu3O7

被引：100

作者：

Revaz, B

Genoud, JY

Junod, A

Neumaier, K

Erb, A

Walker, E

机构：

[1] Univ Geneva, Dept Phys Mat Condensee, CH-1211 Geneva, Switzerland

[2] Walther Meissner Inst Tieftemp Forsch, D-85748 Garching, Germany

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 80卷 / 15期

关键词：

D O I：

10.1103/PhysRevLett.80.3364

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The low temperature specific heat C(T,B) of an YBa2Cu3O7.00 single crystal is measured from 1.2 to 10 K in magnetic fields up to 14 T. The anisotropic component C-aniso(T,B) drop C(T, B parallel to c) - C(T, B perpendicular to c), a pure vortex quantity obtained directly from experiment, is found to obey a scaling relation predicted recently for superconductors with line nodes in the gap. Our experimental field and temperature range correspond to a crossover region, where the limit C-aniso(T,B) alpha TB1/2 does not strictly apply. The variation of the entropy caused by the magnetic field at low T is thermodynamically compatible with measurements near T-c.

引用

页码：3364 / 3367

页数：4

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