Naslov
Bimodal energy relaxation in quasi-1d compounds with a commensurate modulated ground state

Autori
Lasjaunias, Jean-Claude ; Melin, Regis ; Starešinić, Damir ; Biljaković, Katica ; Souletie, Jean

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
5IDMRCS New results, Directions and Opportunities / - Lille : Universite des Sciences et Technologies de Lille, 2005, 144-144

Skup
5th International Discussion Meeting on Relaxations in Complex Systems

Mjesto i datum
Lille, Francuska, 07.07.2005. - 13.07.2005

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
-

Sažetak
We show that the low temperature (T <0.5 K) time dependent non-exponential energy relaxation of quasi-1D compounds strongly differs according to the nature of their modulated ground state. For incommensurate ground states, such as in spin-density wave state of(TMTSF)2PF6, the relaxation time distribution is homogeneously shifted to larger time when the duration of the heat input is increased, and exhibits in addition a scaling between the width (w) and the position (tm) of the peak in the relaxation time distribution: w2 varies as ln(tm). For a commensurate ground state, such as in the spin-Peierls state of(TMTTF)2PF6, the relaxation time spectra show a bimodal character with a weight transfer between well separated slow and fast entities. Our interpretation is based on the dynamics of defects in the modulated structure, which depends crucially on the degree of commensurability.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA