BCS theory of driven superconductivity

Andreas Komnik and Michael Thorwart ()
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Andreas Komnik: Institut für Theoretische Physik, Universität Heidelberg
Michael Thorwart: I. Institut für Theoretische Physik, Universität Hamburg

The European Physical Journal B: Condensed Matter and Complex Systems, 2016, vol. 89, issue 11, 1-5

Abstract: Abstract We study the impact of a time-dependent external driving of the lattice phonons in a minimal model of a BCS superconductor. Upon evaluating the driving-induced vertex corrections of the phonon-mediated electron-electron interaction, we show that parametric phonon driving can be used to elevate the critical temperature T c , while a dipolar phonon drive has no effect. We provide simple analytic expressions for the enhancement factor of T c . Furthermore, a mean-field analysis of a nonlinear phonon-phonon interaction also shows that phonon anharmonicities further amplify T c . Our results hold universally for the large class of normal BCS superconductors.

Keywords: Solid; State; and; Materials (search for similar items in EconPapers)
Date: 2016
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Citations: View citations in EconPapers (1)

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DOI: 10.1140/epjb/e2016-70528-1

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