Evolution of two-gap behavior of the superconductor FeSe_1-x

Details Evolution of two-gap behavior of the superconductor FeSe_1-x Evolution of two-gap behavior of the superconductor FeSe_1-x

2009-12-02

arxiv.org/abs/0912.0471v1

Phys. Rev. Lett. 104, 087004 (2010)

Physics

Condensed Matter

Superconductivity

5 pages, 3 figures

Scientific paper

The superfluid density, \rho_s, of the iron chalcogenide superconductor, FeSe_1-x, was studied as a function of pressure by means of muon-spin rotation. The zero-temperature value of \rho_s increases with increasing transition temperature T_c (increasing pressure) following the tendency observed for various Fe-based and cuprate superconductors. The analysis of \rho_s(T) within the two-gap scheme reveals that the effect on both, T_c and \rho_s(0), is entirely determined by the band(s) where the large superconducting gap develops, while the band(s) with the small gap become practically unaffected.

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