Ultrafast Melting of a Charge-Density Wave in the Mott Insulator
Authors:
- M. BeyeMBM. Beye
- C. SohrtCSC. Sohrt
- T. RohwerTRT. Rohwer
- F. SorgenfreiFSF. Sorgenfrei
- H. RedlinHRH. Redlin
- M. KalläneMKM. Kalläne
- M. Marczynski-BühlowMMM. Marczynski-Bühlow
- F. HenniesFHF. Hennies
- M. BauerMBM. Bauer
- A. FöhlischAFA. Föhlisch
- L. KippLKL. Kipp
- 27 October 2010
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 105 (18) , 187401
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.Keywords
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