BCS theory of driven superconductivity
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 c...
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| Hauptverfasser: | , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
09 November 2016
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| In: |
The European physical journal. B, Condensed matter and complex systems
Year: 2016, Jahrgang: 89, Heft: 11, Pages: 1-5 |
| ISSN: | 1434-6036 |
| DOI: | 10.1140/epjb/e2016-70528-1 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1140/epjb/e2016-70528-1
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| Verfasserangaben: | Andreas Komnik, Michael Thorwart |
| Zusammenfassung: | 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 Tc, while a dipolar phonon drive has no effect. We provide simple analytic expressions for the enhancement factor of Tc. Furthermore, a mean-field analysis of a nonlinear phonon-phonon interaction also shows that phonon anharmonicities further amplify Tc. Our results hold universally for the large class of normal BCS superconductors. |
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| Beschreibung: | Gesehen am 14.05.2020 |
| Beschreibung: | Online Resource |
| ISSN: | 1434-6036 |
| DOI: | 10.1140/epjb/e2016-70528-1 |