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...
Saved in:
| Main Authors: | , |
|---|---|
| Format: | Article (Journal) |
| Language: | English |
| Published: |
09 November 2016
|
| In: |
The European physical journal. B, Condensed matter and complex systems
Year: 2016, Volume: 89, Issue: 11, Pages: 1-5 |
| ISSN: | 1434-6036 |
| DOI: | 10.1140/epjb/e2016-70528-1 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1140/epjb/e2016-70528-1
|
| Author Notes: | Andreas Komnik, Michael Thorwart |
| Summary: | 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. |
|---|---|
| Item Description: | Gesehen am 14.05.2020 |
| Physical Description: | Online Resource |
| ISSN: | 1434-6036 |
| DOI: | 10.1140/epjb/e2016-70528-1 |