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Dynamics of screening in photodoped Mott insulators

MPG-Autoren
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Eckstein,  Martin
CFEL, 22761 Hamburg, Germany;
Theory of Correlated Systems out of Equilibrium, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;

Externe Ressourcen
Volltexte (frei zugänglich)

1507.07953.pdf
(Preprint), 2MB

PhysRevB.92.195123.pdf
(Verlagsversion), 1012KB

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Zitation

Golež, D., Eckstein, M., & Werner, P. (2015). Dynamics of screening in photodoped Mott insulators. Physical Review B, 92(19): 195123. doi:10.1103/PhysRevB.92.195123.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0028-308E-D
Zusammenfassung
We use a nonequilibrium implementation of extended dynamical mean-field theory in combination with a noncrossing approximation impurity solver to study the effect of dynamical screening in photoexcited Mott insulators. The insertion of doublons and holes adds low-energy screening modes and leads to a reduction of the Mott gap. The coupling to low-energy bosonic modes furthermore opens new relaxation channels and significantly speeds up the thermalization process. We also investigate the effect of the energy distribution of the photo doped carriers on the screening.