Naslov
Glass transition in CDW system o-TaS_3

Autori
Biljaković, Katica ; Starešinić, Damir ; Hosseini, Khalil ; Bruetting, Wolfgang

Izvornik
Synthetic metals (0379-6779) 103 (1999), 1-3; 2616-2619

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, kongresno priopcenje, znanstveni

Ključne riječi
charge-density-wave systems; glass transitions; dielectric permittivity; dielectric loss and relaxation

Sažetak
We report on the experimental evidence of a glass transition in the CDW phase of orthorhombic TaS_3 at T_g~50 K, brought by means of dielectric constant measurement. The relaxational mode exhibits in this T-range a critical slowing down instead of an expected activated behavior. New processes appear below the glass transition temperature which we attribute to the defect dynamics. There is an apparent similarity with the scenario of freezing out in supercooled liquids. However, the peculiarity of this glass transition is a very large length scale of order of mu m (beyond the phase coherence length of the underlying CDW), compared to nm in supercooled liquids.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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