Reentrant superconductivity in a strong applied field within the tight-binding model

Details Reentrant superconductivity in a strong applied field within the tight-binding model Reentrant superconductivity in a strong applied field within the tight-binding model

2002-02-14

arxiv.org/abs/cond-mat/0202247v1

Phys. Rev. B 66, 054533 (2002)

Physics

Condensed Matter

Superconductivity

6 pages, 6 figures

Scientific paper

10.1103/PhysRevB.66.054533

It was suggested by Rasolt and Te\v{s}anovi\'c that the Landau level quantization in isotropic superconductors could enhance superconductivity in a very strong magnetic field, above the upper critical field ($H_{c2}$). We derive a generalized Harper equation for superconducting systems, and show that a similar reentrant behavior appears in a lattice model, even though the Landau--level--structure is destroyed by the periodic potential in that case. Both the orbital and the Zeeman field--induced effects are taken into account.

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