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Effective doublon and hole temperatures in the photo-doped dynamic Hubbard model

Hirsch's dynamic Hubbard model describes the effect of orbital expansion with occupancy by coupling the doublon operator to an auxiliary boson. We use the nonequilibrium dynamical mean field method to study the properties of doublon and hole carriers in this model in the strongly correlated regime. In particular, we discuss how photodoping leads to doublon and hole populations with different effective temperatures, and we analyze the relaxation behavior as a function of the boson coupling and boson energy. In the polaronic regime, the nontrivial energy exchange between doublons, holes and bosons can result in a negative temperature distribution for the holes.

preprint2015arXivOpen access
Philipp WernerMartin Eckstein
cond-mat.str-el
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Open access2 authors1 topic
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Philipp WernerMartin Eckstein

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