On the phonon Poiseuille flow in quasi-one dimensional crystal

• Published in: Physica. B, Condensed matter Vol. 263; pp. 678 - 682
• Main Authors: Maynard, R, Smontara, A, Lasjaunias, J.C
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-03-1999
• Subjects: Heat conduction; Phonon Poiseuille flow; Quasi-one-dimensional compound; Heat conduction; Phonon Poiseuille flow; Quasi-one-dimensional compound
• ISSN: 0921-4526; 1873-2135
• DOI: 10.1016/S0921-4526(98)01442-2

We report on thermal conductivity measurements of the quasi-one dimensional single crystals (Ta
1−
x
Nb
x
Se
4)
2I (
x=0, 0.008, 0.01) at low temperatures. In the vicinity of 1 and 2
K for pure and 1
at% Nb doped samples, the thermal conductivity (
κ(
T)) shows a very sharp peak. The presence of the peak in these systems is explained by a phonon Poiseuille flow, originating from their strong anharmonicity, amplified by the lattice anisotropy.