Macroscopic anisotropy in superconductors with anisotropic gaps

被引：97

作者：

Kogan, VG ^{[1
]}

机构：

[1] ISU, Ames Lab, US DOE, Ames, IA 50011 USA

[2] ISU, Dept Phys, Ames, IA 50011 USA

来源：

PHYSICAL REVIEW B | 2002年 / 66卷 / 02期

关键词：

D O I：

10.1103/PhysRevB.66.020509

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

It is shown within the weak-coupling model that the macroscopic superconducting anisotropy for materials with a gap varying on the Fermi surface cannot be characterized by a single number, unlike the case of clean materials with isotropic gaps. For clean uniaxial materials, the anisotropy parameter gamma(T) defined as the ratio of London penetration depths, lambda(c)/lambda(ab), is evaluated for all T's. Within the two-gap model of MgB2, gamma(T) is an increasing function of T.

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页码：1 / 4

页数：4

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