Electronic state around vortex in a two-band superconductor

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Based on the quasiclassical theory, we investigate the vortex state in a two-band superconductor with a small gap on a three dimensional Fermi surface and a large gap on a quasi-two dimensional one, as in MgB_2. The field dependence of zero-energy density of states is compared for fields parallel and perpendicular to the ab plane, and the anisotropy of the vortex core shape is discussed for a parallel field. The Fermi surface geometry of two-bands, combining the effect of the normal-like electronic state on the small gap band at high fields, produces characteristic behavior in the anisotropy of c- and ab-directions.
6 pages, 6 figures, to appear in Phys. Rev. B

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Superconductivity

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http://salesiana.dossiersoluciones.com/handle/123456789/135344

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0409413
 http://arxiv.org/abs/cond-mat/0409413
 Phys. Rev. B 70, 144508 (2004)
 doi:10.1103/PhysRevB.70.144508

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arXiv