Vortex core shrinkage in a two gap superconductor: application to MgB2

Details Vortex core shrinkage in a two gap superconductor: application to MgB2 Vortex core shrinkage in a two gap superconductor: application to MgB2

2006-07-24

arxiv.org/abs/cond-mat/0607599v1

Physica C 460-462, 564 (2007)

Physics

Condensed Matter

Superconductivity

Submitted to M2S-HTSC-VIII conference proceedings

Scientific paper

10.1016/j.physc.2007.04.103

As a model for the vortex core in MgB2 we study a two band model with a clean sigma band and a dirty pi band. We present calculations of the vortex core size in both bands as a function of temperature and show that there exists a Kramer-Pesch effect in both bands even though only one of the bands is in the clean limit. We present calculations for different pi band diffusivities and coherence lengths.

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