Quasiclassical theory of superconducting states under magnetic fields: Thermodynamic properties

Abstract

We present a simple calculational scheme for superconducting properties under magnetic fields. A combination of an approximate analytic solution with a free energy functional in the quasiclassical theory provides a wide use formalism for spatial-averaged thermodynamic properties, and requires a little numerical computation. The theory covers multiband superconductors with various set of singlet and unitary triplet pairings in the presence of an impurity scattering. It is also applicable to analyze experimental results in a rotating magnetic field with help of band structure calculations. We demonstrate the application to s-wave, d_{x^2-y^2}-wave and two-band s-wave pairings, and discuss the validity of the theory comparing with previous numerical studies.

13 pages, 4 figures, ReVTeX4

References in corpus (3)

• Ginzburg-Landau theory of vortices in a multi-gap superconductor
• Gap Structure of the Spin-Triplet Superconductor Sr2RuO4 Determined from the Field-Orientation Dependence of Specific Heat
• Evidence for the Coexistence of Anisotropic Superconducting Gap and Nonlocal Effects in the Non-magnetic Superconductor LuNi2B2C

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