Multiple Gaps and Superfluid Density from Interband Pairing in Iron Oxypnictides

Details Multiple Gaps and Superfluid Density from Interband Pairing in Iron Oxypnictides Multiple Gaps and Superfluid Density from Interband Pairing in Iron Oxypnictides

2008-07-28

arxiv.org/abs/0807.4408v1

Phys. Rev. B 78, 140502(R) (2008)

Physics

Condensed Matter

Superconductivity

4 pages, 3 figures

Scientific paper

10.1103/PhysRevB.78.140502

We study a four-band model for the iron oxypnictides, in which the superconducting properties are assumed to be determined by the interband coupling between hole-like and electron-like Fermi sheets. We show that reasonable parameters can account for the angle-resolved photoemission spectra showing multiple gaps in Ba$_{1-x}$K$_x$Fe$_2$As$_2$, and for the temperature dependence of the superfluid density. At the same time, the zero-temperature value of the superfluid density shows a conventional scaling with the number of carriers.

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