Tuesday, May 21, 2013

1305.4593 (Annica M. Black-Schaffer et al.)

Odd-frequency superconducting pairing in multi-band superconductors    [PDF]

Annica M. Black-Schaffer, Alexander V. Balatsky
We point out that essentially all multi-band superconductors have an odd-frequency pairing component, as follows from a general symmetry analysis of even- and odd-frequency pairing states. We show that odd-frequency superconducting pairing requires only a finite band hybridization, or scattering, and non-identical intraband order parameters, of which only one band needs to be superconducting. Under these conditions odd-frequency odd-interband pairing is always present. From a symmetry analysis we establish a complete reciprocity between parity in band-index and frequency.
View original: http://arxiv.org/abs/1305.4593

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