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The origin of the sharpness of the maximum in the phonon thermal conductivity of (Ta1-xNbxSe4)2I at low temperature


Lasjaunias, Jean Claude; Smontara, Ana; Maynard, Roger; Levy, Francis
The origin of the sharpness of the maximum in the phonon thermal conductivity of (Ta1-xNbxSe4)2I at low temperature // Physica B, 219/220 (1996), 74-76 doi:10.1016/0921-4526(95)00654-0 (podatak o recenziji nije dostupan, kongresno priopćenje, znanstveni)


Naslov
The origin of the sharpness of the maximum in the phonon thermal conductivity of (Ta1-xNbxSe4)2I at low temperature

Autori
Lasjaunias, Jean Claude ; Smontara, Ana ; Maynard, Roger ; Levy, Francis

Izvornik
Physica B (0921-4526) 219/220 (1996); 74-76

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

Ključne riječi
Thermal conductivtiy; scattering processes; (TaSe4)2I

Sažetak
Thermal conductivity (K) studies are reported on alloys of the linear-chain compound (TaSe_4)_2I either pure or doped with Nb, in the low-T regime. K(T) varies like T^3 at very low temperatures, in agreement with the boundary scattering regime. At higher T, there is a deviation from T^3, towards T^n with n less than or similar to 2, for doped samples, which can be explained by a scattering process related to impurities. A sharp anomaly appears in the case of pure and doped (1 at% Nb) alloys around 1 and 1.8 K, respectively, which can be related to very unusual phonon properties of these materials and suggests a possible explanation by the Poiseuille effect.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

Napomena
Rad je kao pozvano predavanje prezentiran na skupu Fourth International Conference on Phonon Physics and Eighth International conference on Phonon Scattering in Condensed Matter (Phonons 95), održanom od 23.-28. 07. 1995., Sapporo, Japan ; objavljen u Knjizi sažetaka / T. Nakayama, S. Tamura (ur.) ; Sapporo, 1995.



POVEZANOST RADA


Projekt / tema
00350107

Ustanove
Institut za fiziku, Zagreb

Autor s matičnim brojem:
Ana Smontara, (119684)

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus


Uključenost u ostale bibliografske baze podataka:


  • INSPEC


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