Mixed state of a dirty two-band superconductor:: Application to MgB2 -: art. no. 177002

被引：116
作者：
Koshelev, AE
Golubov, AA
机构：
[1] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA
[2] Univ Twente, Dept Appl Phys, NL-7500 AE Enschede, Netherlands
来源：
PHYSICAL REVIEW LETTERS | 2003年 / 90卷 / 17期
关键词：
D O I：
10.1103/PhysRevLett.90.177002
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We investigate the vortex state in a two-band superconductor with strong intraband and weak interband electronic scattering rates. Coupled Usadel equations are solved numerically, and the distributions of the pair potentials and local densities of states are calculated for two bands at different values of magnetic fields. The existence of two distinct length scales corresponding to different bands is demonstrated. The results provide qualitative interpretation of recent scanning tunneling microscopy experiments on vortex structure imaging in MgB2.
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