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

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Author

  • S. Hellmann
  • M. Beye
  • C. Sohrt
  • T. Rohwer
  • F. Sorgenfrei
  • H. Redlin
  • M. Kallaene
  • M. Marczynski-Buehlow
  • Franz Hennies
  • M. Bauer
  • A. Foehlisch
  • L. Kipp
  • W. Wurth
  • K. Rossnagel
Show all

Summary, in English

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.

Department/s

Publishing year

2010

Language

English

Publication/Series

Physical Review Letters

Volume

105

Issue

18

Document type

Journal article

Publisher

American Physical Society

Topic

  • Physical Sciences
  • Natural Sciences

Status

Published

ISBN/ISSN/Other

  • ISSN: 1079-7114