Josephson currents in point contacts between dirty two-band superconductors

Details Josephson currents in point contacts between dirty two-band superconductors Josephson currents in point contacts between dirty two-band superconductors

2010-05-19

arxiv.org/abs/1005.3415v1

Physics

Condensed Matter

Superconductivity

11 pages, 3 figures Submitted to Low. Temp. Phys

Scientific paper

10.1063/1.3518605

We developed microscopic theory of Josephson effect in point contacts between dirty two-band superconductors. The general expression for the Josephson current, which is valid for arbitrary temperatures, is obtained. This expression was used for calculation of current-phase relations and temperature dependences of critical current with application to MgB2 superconductor. Also we have considered influence on contact characteristics interband scattering effect appeared in case of dirty superconductors. It is shown that the correction to Josephson current due to the interband scattering depends on phase shift in the banks (i.e. s- or s+/- -wave symmetry of order parameters)

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