Quasiclassical theory of superconducting states under magnetic fields: Thermodynamic properties

Details Quasiclassical theory of superconducting states under magnetic fields: Thermodynamic properties Quasiclassical theory of superconducting states under magnetic fields: Thermodynamic properties

2004-01-07

arxiv.org/abs/cond-mat/0401077v3

Phys. Rev. B70 054509 (2004)

Physics

Condensed Matter

Superconductivity

13 pages, 4 figures, ReVTeX4

Scientific paper

10.1103/PhysRevB.70.054509

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.

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