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Odd-frequency superconductivity in driven systems
Stockholm University, Nordic Institute for Theoretical Physics (Nordita). Center for Quantum Materials (CQM), Sweden; Los Alamos National Laboratory, USA.
Number of Authors: 2
2016 (English)In: Physical Review B, ISSN 2469-9950, E-ISSN 2469-9969, Vol. 94, no 9, 094518Article in journal (Refereed) Published
Abstract [en]

We show that Berezinskii's classification of the symmetries of Cooper pair amplitudes holds for driven systems even in the absence of translation invariance. We then consider a model Hamiltonian for a superconductor coupled to an external driving potential and, treating the drive as a perturbation, we investigate the corrections to the anomalous Green's function, density of states, and spectral function. We find that in the presence of an external drive the anomalous Green's function develops terms that are odd in frequency and that the same mechanism responsible for these odd-frequency terms generates additional features in the density of states and spectral function.

Place, publisher, year, edition, pages
2016. Vol. 94, no 9, 094518
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-135173DOI: 10.1103/PhysRevB.94.094518ISI: 000383861300003OAI: oai:DiVA.org:su-135173DiVA: diva2:1049582
Available from: 2016-11-25 Created: 2016-11-01 Last updated: 2016-11-25Bibliographically approved

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Balatsky, Alexander V.
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Nordic Institute for Theoretical Physics (Nordita)
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