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.
Cite
@article{arxiv.cond-mat/0607599,
title = {Vortex core shrinkage in a two gap superconductor: application to MgB2},
author = {S. Graser and A. Gumann and T. Dahm and N. Schopohl},
journal= {arXiv preprint arXiv:cond-mat/0607599},
year = {2009}
}