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Coupled charge and ...
Coupled charge and spin dynamics in a photo-excited Mott insulator
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- Bittner, Nikolaj (författare)
- Department of Physics, University of Fribourg, Fribourg, Switzerland
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- Golež, Denis (författare)
- Department of Physics, University of Fribourg, Fribourg, Switzerland
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- Strand, Hugo, 1983- (författare)
- Flatiron Institute, Simons Foundation, New York, USA
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- Eckstein, Martin (författare)
- Department of Physics, University of Erlangen-Nürnberg, Erlangen, Germany
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- Werner, Philipp (författare)
- Department of Physics, University of Fribourg, Fribourg, Switzerland
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(creator_code:org_t)
- American Physical Society, 2018
- 2018
- Engelska.
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Ingår i: Physical Review B. - : American Physical Society. - 2469-9950 .- 2469-9969. ; 97:23
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Using a nonequilibrium implementation of the extended dynamical mean-field theory (EDMFT) we simulate the relaxation after photoexcitation in a strongly correlated electron system with antiferromagnetic spin interactions. We consider the t−J model and focus on the interplay between the charge and spin dynamics in different excitation and doping regimes. The appearance of string states after a weak photoexcitation manifests itself in a nontrivial scaling of the relaxation time with the exchange coupling and leads to a correlated oscillatory evolution of the kinetic energy and spin-spin correlation function. A strong excitation of the system, on the other hand, suppresses the spin correlations and results in a relaxation that is controlled by hole scattering. We discuss the possibility of detecting string states in optical and cold-atom experiments.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
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