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arXiv · 0907.1296

Multiband Superconductivity in Spin Density Wave Metals

J. -P. Ismer·Ilya Eremin·Enrico Rossi·Dirk K. Morr·G. Blumberg
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Abstract

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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J. -P. Ismer, Ilya Eremin, Enrico Rossi, Dirk K. Morr, G. Blumberg. 2009-07-07. Multiband Superconductivity in Spin Density Wave Metals. https://doi.org/10.1103/physrevlett.105.037003

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