A phenomenological model of the superconducting state of the Bechgaard salts
Abstract
We present a group theoretical analysis of the superconducting state of the Bechgaard salts, e.g., (TMTSF)2PF6 or (TMTSF)2ClO6. We show that there are eight symmetry distinct superconducting states. Of these only the (fully gapped, even frequency, p-wave, triplet) 'polar state' is consistent with the full range of the experiments on the Bechgaard salts. The gap of the polar state is d(k) (psiuk,0,0), where psiuk may be any odd parity function that is translationally invariant.
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