Thermodynamics of anisotropic-gap and multiband clean BCS superconductors
T. Mishonov, E. Penev
Abstract
The free energy, non-gradient terms of the Ginzburg-Landau expansion, and the jump of the specific heat of a multiband anisotropic-gap clean BCS superconductor are derived in the framework of a separable-kernel approximation. Results for a two-band superconductor, d-wave superconductor, and some recent models for MgB2 are derived as special cases.
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