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Odd-frequency superconductivity in driven systems
KTH, Centres, Nordic Institute for Theoretical Physics NORDITA.
KTH, Centres, Nordic Institute for Theoretical Physics NORDITA.
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
American Physical Society , 2016. Vol. 94, no 9, 094518
Keyword [en]
Ferromagnet Structures
National Category
Physical Sciences
URN: urn:nbn:se:kth:diva-193986DOI: 10.1103/PhysRevB.94.094518ISI: 000383861300003OAI: diva2:1037658
EU, European Research Council, DM-321031

QC 20161017

Available from: 2016-10-17 Created: 2016-10-14 Last updated: 2016-10-17Bibliographically approved

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Triola, ChristopherBalatsky, Alexander V.
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