Dynamics of screening in photodoped Mott insulators

Golež, Denis; Eckstein, Martin; Werner, Philipp

doi:10.1103/PhysRevB.92.195123

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Journal Article

Dynamics of screening in photodoped Mott insulators

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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;

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http://arxiv.org/abs/1507.07953
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http://dx.doi.org/10.1103/PhysRevB.92.195123
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1507.07953.pdf
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PhysRevB.92.195123.pdf
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Citation

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.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0028-308E-D

Abstract

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.