Nontrivial interplay between superconductivity and spin-orbit coupling in non-centrosymmetric ferromagnets

Details Nontrivial interplay between superconductivity and spin-orbit coupling in non-centrosymmetric ferromagnets Nontrivial interplay between superconductivity and spin-orbit coupling in non-centrosymmetric ferromagnets

2008-10-07

arxiv.org/abs/0810.1281v1

Phys. Rev. B 78, 172502 (2008)

Physics

Condensed Matter

Superconductivity

4 pages, 1 figure. Accepted for publication in Phys. Rev. B

Scientific paper

10.1103/PhysRevB.78.172502

Motivated by the recent discoveries of ferromagnetic and non-centrosymmetric superconductors, we present a mean-field theory for a superconductor that \textit{both} lacks inversion symmetry and displays ferromagnetism, a scenario which is believed to be realized in UIr. We study the interplay between the order parameters to clarify how superconductivity is affected by the presence of ferromagnetism and spin-orbit coupling. One of our key findings is that the spin-orbit coupling seems to enhance both ferromagnetism and superconductivity in all spin channels. We discuss our results in the context of the heavy fermion superconductor UIr and analyze possible symmetries of the order parameter by the group theory method.

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