Naslov
Bimodal energy relaxation in quasi-one-dimensional compounds with commensurate modulated ground state

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

Izvornik
Physical review letters (0031-9007) 94 (2005), 24; 5701(1-4)

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
complex relaxation; heterogeneity; commensurability; density wave

Sažetak
We show that the low temperature (T <0.5 K) time dependent nonexponential energy relaxation of quasi-one-dimensional compounds strongly differs according to the nature of their modulated ground state. For incommensurate ground states, such as in (TMTSF2PF6 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 and the position of the peak in the relaxation time distribution, w2&lntm. For a commensurate ground state, as in (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 depend crucially on the degree of commensurability.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA