Mixed state of a dirty two-band superconductor:: Application to MgB2 -: art. no. 177002
Mixed state of a dirty two-band superconductor:: Application to MgB2 -: art. no. 177002
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DOI：
10.1103/physrevlett.90.177002
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发表时间：
2003-05-02
影响因子：
8.6
通讯作者：
Golubov, AA
中科院分区：
文献类型：
--
作者：
Koshelev, AE;Golubov, AA
研究了具有强带内和弱带间电子散射率的双带超导体中的涡旋态。数值求解了耦合的Usadel方程，计算了两个带在不同磁场下的对势和局域态密度的分布。两个不同的长度尺度对应于不同的频带的存在被证明。结果提供了定性的解释最近的扫描隧道显微镜实验的涡旋结构成像MgB2。
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.