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

Werner, P., & Eckstein, M. (2016). Effective doublon and hole temperatures in the photo-doped dynamic Hubbard model. Structural Dynamics, 3(2): 023603. doi:10.1063/1.4935245.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0029-0D1D-A Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0029-C70B-3
Genre: Journal Article

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1.4935245.pdf (Publisher version), 3MB
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2015
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© Werner and Eckstein
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http://dx.doi.org/10.1063/1.4935245 (Publisher version)
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http://arxiv.org/abs/1508.07117 (Preprint)
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 Creators:
Werner, Philipp1, Author
Eckstein, Martin2, 3, 4, Author              
Affiliations:
1Department of Physics, University of Fribourg, 1700 Fribourg, Switzerland, ou_persistent22              
2Theory of Correlated Systems out of Equilibrium, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_1938296              
3Department of Physics, University of Hamburg, Hamburg 20148, Germany, ou_persistent22              
4Center for Free-Electron Laser Science, Hamburg 22761, Germany, ou_persistent22              

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Free keywords: Hubbard model; Insulators; Band gap; Energy transfer; Chemical potential
 Abstract: Hirsch's dynamic Hubbard model describes the effect of orbital expansion with occupancy by coupling the doublon operator to an auxiliary boson. In the Mott insulating phase, empty sites (holes) and doubly occupied orbitals (doublons) become charge carriers on top of the half-filled background. We use the nonequilibrium dynamical mean field method to study the properties of photo-doped doublons and holes 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.

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Language(s): eng - English
 Dates: 2015-08-282015-10-262015-11-092016-03
 Publication Status: Published in print
 Pages: 12
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1063/1.4935245
arXiv: 1508.07117
 Degree: -

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Title: Structural Dynamics
Source Genre: Journal
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Publ. Info: Melville, NY : American Institute of Physics
Pages: - Volume / Issue: 3 (2) Sequence Number: 023603 Start / End Page: - Identifier: Other: 2329-7778
CoNE: /journals/resource/2329-7778