Publikation: Non-thermal melting of a Charge Density Wave in TiSe2
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2011
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Möhr-Vorobeva, Ekaterina
Johnson, Steven L.
Beaud, Paul
Staub, Urs
De Souza, R. A.
Milne, Chris
Ingold, Gerhard
Titov, A.
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Physical Review Letters. 2011, 107(3). ISSN 0031-9007. Available under: doi: 10.1103/PhysRevLett.107.036403
Zusammenfassung
We use time-resolved optical reflectivity and x-ray diffraction with femtosecond resolution to study the dynamics of the structural order parameter of the charge density wave phase in TiSe2. We find that the energy density required to melt the charge density wave nonthermally is substantially lower than that required for thermal suppression and is comparable to the charge density wave condensation energy. This observation, together with the fact that the structural dynamics take place on an extremely fast time scale, supports the exciton condensation mechanism for the charge density wave in TiSe2.
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MÖHR-VOROBEVA, Ekaterina, Steven L. JOHNSON, Paul BEAUD, Urs STAUB, R. A. DE SOUZA, Chris MILNE, Gerhard INGOLD, Jure DEMSAR, Hanjo SCHÄFER, A. TITOV, 2011. Non-thermal melting of a Charge Density Wave in TiSe2. In: Physical Review Letters. 2011, 107(3). ISSN 0031-9007. Available under: doi: 10.1103/PhysRevLett.107.036403BibTex
@article{MohrVorobeva2011Nonth-17047,
year={2011},
doi={10.1103/PhysRevLett.107.036403},
title={Non-thermal melting of a Charge Density Wave in TiSe2},
number={3},
volume={107},
issn={0031-9007},
journal={Physical Review Letters},
author={Möhr-Vorobeva, Ekaterina and Johnson, Steven L. and Beaud, Paul and Staub, Urs and De Souza, R. A. and Milne, Chris and Ingold, Gerhard and Demsar, Jure and Schäfer, Hanjo and Titov, A.}
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<dcterms:abstract xml:lang="eng">We use time-resolved optical reflectivity and x-ray diffraction with femtosecond resolution to study the dynamics of the structural order parameter of the charge density wave phase in TiSe2. We find that the energy density required to melt the charge density wave nonthermally is substantially lower than that required for thermal suppression and is comparable to the charge density wave condensation energy. This observation, together with the fact that the structural dynamics take place on an extremely fast time scale, supports the exciton condensation mechanism for the charge density wave in TiSe2.</dcterms:abstract>
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