Electronic state around vortex in a two-band superconductor

被引：37

作者：

Ichioka, M ^{[1
]}

Machida, K

Nakai, N

Miranovic, P

机构：

[1] Okayama Univ, Dept Phys, Okayama 7008530, Japan

[2] Kyoto Univ, Yukawa Inst Theoret Phys, Kyoto 6068502, Japan

[3] Univ Montenegro, Dept Phys, YU-81000 Podogrica, Serbia

来源：

PHYSICAL REVIEW B | 2004年 / 70卷 / 14期

关键词：

D O I：

10.1103/PhysRevB.70.144508

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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 MgB2. 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.

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页码：144508 / 1

页数：6

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