Odd-frequency superconductivity in driven systems

Christopher Triola and Alexander V. Balatsky
Phys. Rev. B 94, 094518 – Published 22 September 2016

Abstract

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.

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  • Received 22 December 2015
  • Revised 2 September 2016

DOI:https://doi.org/10.1103/PhysRevB.94.094518

©2016 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Christopher Triola1,2 and Alexander V. Balatsky1,2,3

  • 1Nordita, Roslagstullsbacken 23, SE-106 91 Stockholm, Sweden
  • 2Center for Quantum Materials (CQM), KTH and Nordita, Stockholm, Sweden
  • 3Institute for Materials Science, Los Alamos National Laboratory, Los Alamos New Mexico 87545, USA

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Issue

Vol. 94, Iss. 9 — 1 September 2016

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