Cooper Pairs with Broken Time-Reversal, Parity, and Spin-Rotational Symmetries in Singlet Type-II Superconductors

Abstract

We show that singlet superconductivity in the Abrikosov vortex phase is absolutely unstable with respect to the appearance of a chiral triplet component of a superconducting order parameter. This chiral component, p_x + i p_y, breaks time-reversal, parity, and spin rotational symmetries of the internal order parameter, responsible for a relative motion of two electrons in the Cooper pair. We demonstrate that the symmetry breaking Pauli paramagnetic effects can be tuned by a magnetic field strength and direction and can be made of the order of unity in organic and high-temperature layered superconductors.

arXiv commentSubmitted to Physical Review Letters on May 9th 2008

References in corpus (7)

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• The Nernst effect in high-$T_c$ superconductors
• High Resolution Polar Kerr Effect Measurements of Sr2RuO4: Evidence for Broken Time Reversal Symmetry in the Superconducting State
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• Structure of the core of magnetic vortices in d-wave superconductors with a subdominant triplet pairing mechanism
• Triplet pair correlations in {\it s-}wave superfluids as a signature of the FFLO state
• Generic nodeless Larkin Ovchinnikov states due to singlet-triplet mixing
• Possible Existence of Superconductivity in the Quasi-One-Dimensional Conductor Li${}_{0.9}$Mo${}_6$O${}_{17}$ at Ultrahigh Magnetic Fields, $H\ge 45T$