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  Ultrafast Quenching of the Exchange Interaction in a Mott Insulator

Mentink, J. H., & Eckstein, M. (2014). Ultrafast Quenching of the Exchange Interaction in a Mott Insulator. Physical Review Letters, 113(5): 057201. doi:10.1103/PhysRevLett.113.057201.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0028-1682-6 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0028-2D79-7
Genre: Journal Article

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PhysRevLett.113.057201.pdf (Publisher version), 508KB
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PhysRevLett.113.057201.pdf
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2014
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© American Physical Society
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http://arxiv.org/abs/1401.5308 (Preprint)
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 Creators:
Mentink, Johan H.1, 2, Author              
Eckstein, Martin1, 2, Author              
Affiliations:
1Theory of Correlated Systems out of Equilibrium, Research Groups, Max Planck Research Department for Structural Dynamics, Department of Physics, University of Hamburg, External Organizations, ou_2173641              
2CFEL, 22761 Hamburg, Germany, ou_persistent22              

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Free keywords: PACS numbers: 75.78.Jp, 71.10.Fd
 Abstract: We investigate how fast and how effective photocarrier excitation can modify the exchange interaction Jex in the prototype Mott-Hubbard insulator. We demonstrate an ultrafast quenching of Jex both by evaluating exchange integrals from a time-dependent response formalism and by explicitly simulating laser-induced spin precession in an antiferromagnet that is canted by an external magnetic field. In both cases, the electron dynamics is obtained from nonequilibrium dynamical mean-field theory. We find that the modified Jex emerges already within a few electron hopping times after the pulse, with a reduction that is comparable to the effect of chemical doping.

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Language(s): eng - English
 Dates: 2014-01-202014-07-292014-08-01
 Publication Status: Published in print
 Pages: 5
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1103/PhysRevLett.113.057201
arXiv: 1401.5308
 Degree: -

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Title: Physical Review Letters
  Abbreviation : Phys. Rev. Lett.
Source Genre: Journal
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Publ. Info: Woodbury, N.Y. : American Physical Society
Pages: - Volume / Issue: 113 (5) Sequence Number: 057201 Start / End Page: - Identifier: ISSN: 0031-9007
CoNE: https://pure.mpg.de/cone/journals/resource/954925433406_1