Femtosecond nonequilibrium dynamics in quasi-1D CDW systems K0.3MoO3 and RB0.3MoO3 (CROSBI ID 150883)
Prilog u časopisu | kratko priopćenje | međunarodna recenzija
Podaci o odgovornosti
Tomeljak, Andrej ; Kavčič, Blaž ; Schäfer, Hanjo ; Kabanov, Viktor ; Mihailovič, Dragan ; Starešinić, Damir ; Biljaković, Katica ; Demšar, Jure
engleski
Femtosecond nonequilibrium dynamics in quasi-1D CDW systems K0.3MoO3 and RB0.3MoO3
Here we report on detailed studies of the photoexcited carrier and collective mode dynamics in prototype quasi-1D charge density wave (CDW) systems K0:3MoO3 and Rb0:3MoO3 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.
charge density waves; femtosecond real-time dynamics; collective modes
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Podaci o izdanju
404 (3-4)
2009.
548-551
objavljeno
0921-4526
10.1016/j.physb.2008.11.049