Journal
PHYSICAL REVIEW B
Volume 88, Issue 10, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.88.104514
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Funding
- Swedish research council (VR)
- European Research Council under the European Union's Seventh Framework Programme [DM-321031]
- US DoE Basic Energy Sciences [DE-AC52-06NA25396]
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We point out that essentially all multiband 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 nonidentical 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.
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