Microwave response of superconducting pnictides: extended $s_{\pm}$ scenario

Details Microwave response of superconducting pnictides: extended $s_{\pm}$ scenario Microwave response of superconducting pnictides: extended $s_{\pm}$ scenario

2009-04-07

arxiv.org/abs/0904.1224v3

Published in NEW JOURNAL OF PHYSICS 11, 075012 (2009)

Physics

Condensed Matter

Superconductivity

11 pages, 5 figures

Scientific paper

We consider a two-band superconductor with relative phase $\pi $ between the two order parameters as a model for the superconducting state in ferropnictides. Within this model we calculate the microwave response and the NMR relaxation rate. The influence of intra- and interband impurity scattering beyond the Born and unitary limits is taken into account. We show that, depending on the scattering rate, various types of power law temperature dependencies of the magnetic field penetration depth and the NMR relaxation rate at low temperatures may take place.

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