Multiband Superconductivity in Spin Density Wave Metals

Details Multiband Superconductivity in Spin Density Wave Metals Multiband Superconductivity in Spin Density Wave Metals

2009-07-07

arxiv.org/abs/0907.1296v1

Phys. Rev. Lett. 105, 037003 (2010)

Physics

Condensed Matter

Superconductivity

4 pages, 3 figures

Scientific paper

We study the emergence of multiband superconductivity with $s$- and $d-$wave symmetry on the background of spin density wave (SDW). We show that the SDW coherence factors renormalize the momentum dependence of the superconducting (SC) gap, yielding a SC state with an \emph{unconventional} s-wave symmetry. Interband Cooper pair scattering stabilizes superconductivity in both symmetries. With increasing SDW order, the s-wave state is more strongly suppressed than the d-wave state. Our results are universally applicable to two-dimensional systems with a commensurate SDW.

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