Pairing state in multicomponent superconductorsV. Kuznetsova and V. Barzykin
Department of Physics and Astronomy, University of Tennessee Knoxville, TN 37996, USA
received 28 June 2005; accepted in final form 6 September 2005
published online 28 September 2005
We use the microscopic weak-coupling theory to predict the pairing state in superconductors of cubic, hexagonal, or tetragonal symmetry, where the order parameter is multicomponent, i.e., transforms according to either a 2-dimensional or a 3-dimensional representation of the crystal point group. We show that the superconducting phase usually breaks the time-reversal symmetry for singlet multicomponent superconductors. The superconducting order parameter for triplet superconductors in most cases turns out to be non-magnetic.
74.20.-z - Theories and models of superconducting state.
74.20.Rp - Pairing symmetries (other than -wave).
74.25.Dw - Superconductivity phase diagrams.
© EDP Sciences 2005