Electronic state around vortex in a two-band superconductor
Superconductivity
2007-08-01 v1
Abstract
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.
Cite
@article{arxiv.cond-mat/0409413,
title = {Electronic state around vortex in a two-band superconductor},
author = {Masanori Ichioka and Kazushige Machida and Noriyuki Nakai and Predrag Miranovic},
journal= {arXiv preprint arXiv:cond-mat/0409413},
year = {2007}
}
Comments
6 pages, 6 figures, to appear in Phys. Rev. B