Phonon-enhanced relaxation and excitation in the Holstein-Hubbard model
- Werner, Philipp Department of Physics, University of Fribourg, Switzerland
- Eckstein, Martin Max Planck Research Department for Structural Dynamics, University of Hamburg-CFEL, Germany
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07.10.2013
Published in:
- Physical Review B. - 2013, vol. 88, no. 16, p. 165108
English
We study quenches of the interaction and electron-phonon coupling parameter in the Hubbard-Holstein model, using nonequilibrium dynamical mean field theory. The calculations are based on a generalized Lang-Firsov scheme for time-dependent interactions or externally driven phonons, and an approximate strong-coupling impurity solver. The interaction quench calculations reveal the phonon-assisted decay of excess doublons, while the quenches of the electron-phonon coupling lead to persistent oscillations of the phonons and to a phonon-enhanced doublon production.
- Faculty
- Faculté des sciences et de médecine
- Department
- Département de Physique
- Language
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- English
- Classification
- Physics
- License
- License undefined
- Identifiers
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- RERO DOC 208668
- DOI 10.1103/PhysRevB.88.165108
- Persistent URL
- https://folia.unifr.ch/unifr/documents/303366
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