Anisotropy of the penetration depth in YBa2Cu3O7-delta: Josephson-tunneling studies

被引：34

作者：

Sun, AG

Han, SH

Katz, AS

Gajewski, DA

Maple, MB

Dynes, RC

机构：

[1] Department of Physics, University of California, San Diego, San Diego

来源：

PHYSICAL REVIEW B | 1995年 / 52卷 / 22期

关键词：

D O I：

10.1103/PhysRevB.52.R15731

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The modulation of the Josephson critical current between two superconductors in a magnetic field provides a direct, low-field dc measurement of the penetration depth of the two superconductors. To measure the in-plane penetration depth anisotropy of YBa2Cu3O7-delta, we have fabricated low leakage Pb/Insulator/YBa2Cu3O7-delta tunnel junctions on detwinned YBa2Cu3O7-delta single crystals with tunneling along the c axis. By applying the magnetic field along the b and a crystalline axes of YB(a)2Cu(3)O(7-delta) lambda(a) and b are extracted from the respective field modulation patterns. We find a large anisotropy [(lambda(a)/lambda(b))(2) greater than or equal to 2] of the penetration depths along the a and b axes.

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页码：15731 / 15733

页数：3

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