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Nonequilibrium $GW+\mathrm{EDMFT}$: Antiscreening and Inverted Populations from Nonlocal Correlations

  • Golež, Denis Department of Physics, University of Fribourg, Switzerland
  • Boehnke, Lewin Department of Physics, University of Fribourg, Switzerland
  • Strand, Hugo U. R. Department of Physics, University of Fribourg, Switzerland
  • Eckstein, Martin Max-Planck Institute for the Structure and Dynamics of Matter, Hamburg, Germany
  • Werner, Philipp Department of Physics, University of Fribourg, Switzerland
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    15.06.2017
Published in:
  • Physical Review Letters. - 2017, vol. 118, no. 24, p. 246402
English We study the dynamics of screening in photodoped Mott insulators with long-ranged interactions using a nonequilibrium implementation of the GW plus extended dynamical mean-field theory formalism. Our study demonstrates that the complex interplay of the injected carriers with bosonic degrees of freedom (charge fluctuations) can result in long-lived transient states with properties that are distinctly different from those of thermal equilibrium states. Systems with strong nonlocal interactions are found to exhibit a self-sustained population inversion of the doublons and holes. This population inversion leads to low-energy antiscreening which can be detected in time- resolved electron-energy-loss spectra.
Faculty
Faculté des sciences et de médecine
Department
Département de Physique
Language
  • English
Classification
Physics
License
License undefined
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Persistent URL
https://folia.unifr.ch/unifr/documents/306149
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