Femtosecond nonequilibrium dynamics in quasi-1D CDW systems and
| Autor: | Dragan Mihailovic, Viktor V. Kabanov, Damir Starešinić, A. Tomeljak, Hanjo Schäfer, Katica Biljaković, Jure Demsar, B. Kavcic |
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| Rok vydání: | 2009 |
| Předmět: |
Physics
Condensed matter physics Phonon Condensed Matter Physics Electronic Optical and Magnetic Materials Photoexcitation Excited state Density of states Quasiparticle Relaxation (physics) Condensed Matter::Strongly Correlated Electrons Electrical and Electronic Engineering Charge density wave Excitation |
| Zdroj: | Physica B: Condensed Matter. 404:548-551 |
| ISSN: | 0921-4526 |
| Popis: | Here we report on detailed studies of the photoexcited carrier and collective mode dynamics in prototype quasi-1D charge density wave (CDW) systems K 0.3 MoO 3 and Rb 0.3 MoO 3 focusing on their low temperature and low excitation range. We show that the order parameter relaxation dynamics are inconsistent with the Rothwarf–Taylor model describing the relaxation of the coupled quasi-particle and high frequency phonon system in a system with a narrow gap in the density of states. Therefore we propose an alternative model that accounts for the photoexcited carrier relaxation phenomena commonly observed in CDW systems. |
| Databáze: | OpenAIRE |
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