Possible light-induced superconductivity in a strongly correlated electron system

Bittner, Nikolaj; Tohyama, Takami; Kaiser, Stefan; Manske, Dirk

doi:10.7566/JPSJ.88.044704

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Possible light-induced superconductivity in a strongly correlated electron system

Bittner, Nikolaj Max-Planck-Institut für Festkörperforschung, Stuttgart, Germany - Department of Physics, University of Fribourg, Switzerland
Tohyama, Takami Department of Applied Physics, Tokyo University of Science, Katsushika, Tokyo, Japan
Kaiser, Stefan Max-Planck-Institut für Festkörperforschung, Stuttgart, Germany - 4th Physics Institute, University of Stuttgart, Germany
Manske, Dirk Max-Planck-Institut für Festkörperforschung, Stuttgart, Germany

13.03.2019

Published in:

Journal of the Physical Society of Japan. - 2019, vol. 88, no. 4, p. 044704

English Using a nonequilibrium implementation of the Lanczos-based exact diagonalisation technique we study the possibility of the light-induced superconducting phase coherence in a solid state system after an ultrafast optical excitation. In particular, we investigate the buildup of superconducting correlations by calculating an exact time- dependent wave function reflecting the properties of the system in non-equilibrium and the corresponding transient response functions. Within our picture we identify a possible transient Meissner effect after dynamical quenching of the non- superconducting wavefunction and extract a characteristic superfluid density that we compare to experimental data. Finally, we find that the stability of the induced superconducting state depends crucially on the nature of the excitation quench: namely, a pure interaction quench induces a long-lived superconducting state, whereas a phase quench leads to a short-lived transient superconductor.

Faculty

Faculté des sciences et de médecine

Department

Département de Physique

Language