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

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

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127 Citeringar (SciVal)

Sammanfattning

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.
Originalspråkengelska
Artikelnummer187401
TidskriftPhysical Review Letters
Volym105
Utgåva18
DOI
StatusPublished - 2010

Ämnesklassifikation (UKÄ)

  • Fysik
  • Naturvetenskap

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