Magnetic behaviour of dirty multiband superconductors near the upper critical field
arXiv:1603.06054 · doi:10.1103/PhysRevB.93.214509
Abstract
Magnetic properties of dirty multiband superconductors near the upper critical field are studied. The parameter characterizing magnetization slope is shown to have a significant temperature variation which is quite sensitive to the pairing interactions and relative strengths of intraband impurity scattering. In contrast to single-band superconductors the increase of at low temperatures can be arbitrary large determined by the ratio of minimal and maximal diffusion coefficients in different bands. Temperature dependencies of in two-band MgB and iron-based superconductors are shown to be much more sensitive to the multiband effects than the upper critical field .
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