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Femtosecond nonequilibrium dynamics in quasi-1D CDW systems and

✍ Scribed by A. Tomeljak; B. Kavcic; H. Schäfer; V.V. Kabanov; D. Mihailovic; D. Staresinic; K. Biljakovic; J. Demsar

Publisher
Elsevier Science
Year
2009
Tongue
English
Weight
338 KB
Volume
404
Category
Article
ISSN
0921-4526

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✦ Synopsis

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.

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