Naslov
Contribution of charge-density-wave phase excitations to thermal conductivity below the Peierls transition

Autori
Smontara, Ana ; Biljaković, Katica ; Artemenko, S. N.

Izvornik
Physical review. B, Condensed matter (0163-1829) 48 (1993), 7; 4329-4334

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

Ključne riječi
charge-density-wave phase excitations ; thermal conductivity ; Peierls transition ; quasi-one-dimensional conductor ; phasons ; screening ; Coulomb interaction ; quasiparticles ; (NbSe4)/10/3I

Sažetak
The authors report on measurements of the thermal conductivity of the quasi-one-dimensional conductor (NbSe4)/10/3I between 80 and 320 K. They show that the thermal conductivity exhibits a well-defined minimum below the Peierls transition temperature Tp=285 K. Such behavior has also been found in the charge-density-wave (CDW) conductors K0.3MoO3 and (TaSe4)2I, and seems to be a generic property of CDW systems. They propose that this feature results from the contribution of low-frequency phasons of rather large velocity. The position of the minimum in the thermal conductivity corresponds to the temperature range where the screening of the Coulomb interaction by the quasiparticles (electron-hole pairs) becomes effective and consequently enables the phason contribution.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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