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Low temperature thermal conductivity of quasi-one dimensional compounds (NbSe4)3I and (TaSe4)2I (CROSBI ID 111852)

Prilog u časopisu | kratko priopćenje | međunarodna recenzija

Smontara, Ana ; Lasjaunias, J.C. ; Monceau, P. ; Mazuer, J. ; Apostol, M. ; Levy, F. ; Berger, H. ; Bihar, Željko ; Biljaković, Katica Low temperature thermal conductivity of quasi-one dimensional compounds (NbSe4)3I and (TaSe4)2I // Synthetic metals, 56 (1993), 2-3; 2743-2748. doi: 10.1016/0379-6779(93)90028-U

Podaci o odgovornosti

Smontara, Ana ; Lasjaunias, J.C. ; Monceau, P. ; Mazuer, J. ; Apostol, M. ; Levy, F. ; Berger, H. ; Bihar, Željko ; Biljaković, Katica

engleski

Low temperature thermal conductivity of quasi-one dimensional compounds (NbSe4)3I and (TaSe4)2I

The authors report measurements of the thermal conductivity, K, of the quasi-one dimensional conductors (NbSe4)3I and (TaSe4)2I in the temperature region between 70 mK and 4 K, and they compare them to the data which they obtained with the second experimental method between 1.2 K and 10 K. The behaviour of K for ((NbSe4)3I is almost regular compared to the other dielectric materials, namely it goes like T2.7 in the low temperature regime close to the expected boundary scattering regime, while in the case of(TaSe4)2I, it exhibits a pronounced anomaly which has the shape of broad minimum around 3 K. The anomaly can be related to an excess specific heat in the same temperature range. They ascribe this anomaly to a strong phonon scattering by phonons of low-lying transverse acoustic modes only propagative in a restricted part of the Brillouin zone.

low temperature ; quasi-one dimensional compounds ; boundary scattering regime ; anomaly ; broad minimum ; excess specific heat ; strong phonon scattering ; low-lying transverse acoustic modes ; Brillouin zone ; 70 mK to 4 K ; (NbSe4)3I ; (TaSe4)2I

Rad je kao poster prezentiran na skupu Internatioanl Conference on Science and Technology of Synthetic Metals, održanom od 12.-18.08.1992., Goteborg, Švedska ; objavljen u Knjizi sažetaka / Stafstrom S. (ur.) ; Goteberg, 1992. ; str. 232-232.

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Podaci o izdanju

56 (2-3)

1993.

2743-2748

objavljeno

0379-6779

10.1016/0379-6779(93)90028-U

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Fizika

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