Magnetic field dependence of λ in YBa2Cu3O6.95:: Results as a function of temperature and field orientation

被引：49

作者：

Bidinosti, CP ^{[1
]}

Hardy, WN ^{[1
]}

Bonn, DA ^{[1
]}

Liang, RX ^{[1
]}

机构：

[1] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 83卷 / 16期

关键词：

D O I：

10.1103/PhysRevLett.83.3277

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present measurements of the magnetic field dependence of the penetration depth lambda(H) for an untwinned YBa2Cu3O6.95 Single crystal for temperatures from 1.2 to 7 K in de fields up to 177 G and directions 0 degrees, +/-45 degrees, and 90 degrees with respect to the crystal b axis. The edges of the platelet sample have been polished round to limit extrinsic effects. At 1.2 K, Delta lambda(H) in the a and b directions could be interpreted as agreeing with the Yip and Sauls prediction for the nonlinear Meissner effect in a d-wave superconductor. However, the systematics versus temperature and orientation, a key aspect of the theory, do not agree, and we conclude that the nonlinear Meissner effect is suppressed by a factor of 10 or larger.

引用

页码：3277 / 3280

页数：4

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