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Ultrafast Melting of a Charge-Density Wave in the Mott Insulator 1T-TaS2

Hellmann, S.; Beye, M.; Sohrt, C.; Rohwer, T.; Sorgenfrei, F.; Redlin, H.; Kallaene, M.; Marczynski-Buehlow, M.; Hennies, Franz LU and Bauer, M., et al. (2010) In Physical Review Letters 105(18).
Abstract
Femtosecond time-resolved core-level photoemission spectroscopy with a free-electron laser is used to measure the atomic-site specific charge-order dynamics of the charge-density wave in the Mott insulator 1T-TaS2. After strong photoexcitation, a prompt loss of charge order and subsequent fast equilibration dynamics of the electron-lattice system are observed. On the time scale of electron-phonon thermalization, about 1 ps, the system is driven across a phase transition from a long-range charge ordered state to a quasiequilibrium state with domainlike short-range charge and lattice order. The experiment opens the way to study the nonequilibrium dynamics of condensed matter systems with full elemental, chemical, and atomic-site selectivity.
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publication status
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Physical Review Letters
volume
105
issue
18
publisher
American Physical Society
external identifiers
  • wos:000283542500017
  • scopus:78049254428
ISSN
1079-7114
DOI
10.1103/PhysRevLett.105.187401
language
English
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yes
id
4e13e8f2-e1e4-4ba7-b60a-644698d8d189 (old id 1720257)
date added to LUP
2010-12-09 13:32:10
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2018-06-24 03:12:27
@article{4e13e8f2-e1e4-4ba7-b60a-644698d8d189,
  abstract     = {Femtosecond time-resolved core-level photoemission spectroscopy with a free-electron laser is used to measure the atomic-site specific charge-order dynamics of the charge-density wave in the Mott insulator 1T-TaS2. After strong photoexcitation, a prompt loss of charge order and subsequent fast equilibration dynamics of the electron-lattice system are observed. On the time scale of electron-phonon thermalization, about 1 ps, the system is driven across a phase transition from a long-range charge ordered state to a quasiequilibrium state with domainlike short-range charge and lattice order. The experiment opens the way to study the nonequilibrium dynamics of condensed matter systems with full elemental, chemical, and atomic-site selectivity.},
  articleno    = {187401},
  author       = {Hellmann, S. and Beye, M. and Sohrt, C. and Rohwer, T. and Sorgenfrei, F. and Redlin, H. and Kallaene, M. and Marczynski-Buehlow, M. and Hennies, Franz and Bauer, M. and Foehlisch, A. and Kipp, L. and Wurth, W. and Rossnagel, K.},
  issn         = {1079-7114},
  language     = {eng},
  number       = {18},
  publisher    = {American Physical Society},
  series       = {Physical Review Letters},
  title        = {Ultrafast Melting of a Charge-Density Wave in the Mott Insulator 1T-TaS2},
  url          = {http://dx.doi.org/10.1103/PhysRevLett.105.187401},
  volume       = {105},
  year         = {2010},
}