Ultrafast melting of a charge-density wave in the mott insulator 1T-TaS2

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Autor/in:
Erscheinungsjahr:
2010
Medientyp:
Text
Schlagworte:
  • Charge density waves
  • Charge density
  • Transition metals
  • Superconductors (Materials)
  • Superconducting Materials
  • Superconductivity
  • Charge density waves
  • Charge density
  • Transition metals
  • Superconductors (Materials)
  • Superconducting Materials
  • Superconductivity
Beschreibung:
  • 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. © 2010 The American Physical Society.
Lizenz:
  • info:eu-repo/semantics/closedAccess
Quellsystem:
Forschungsinformationssystem der UHH
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oai:www.edit.fis.uni-hamburg.de:publications/c4a97c85-f577-4fd1-b59a-af66478773c1