Theory of fluctuations in a two-band superconductor:: MgB2 -: art. no. 064523

被引：31

作者：

Koshelev, AE

Varlamov, AA

Vinokur, VM

机构：

[1] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA

[2] INFM, Coherentia, I-00133 Rome, Italy

来源：

PHYSICAL REVIEW B | 2005年 / 72卷 / 06期

关键词：

D O I：

10.1103/PhysRevB.72.064523

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A theory of fluctuations in two-band superconductor MgB2 is developed. Since the standard Ginzburg-Landau (GL) approach fails in description of its properties, we generalize it based on the microscopic theory of a two-band superconductor. Calculating the microscopic fluctuation propagator, we build up the nonlocal two-band GL functional and the corresponding time-dependent GL equations. This allows us to calculate the main fluctuation observables such as fluctuation specific heat and conductivity.

引用

页数：11

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