Phonon transport and imaging
Phonon scattering by quantum rotor and spin conversion in solid Kr-CH4 solutions
Abstract
The measurement results on the thermal conductivity K(T) of solid Kr1–x(CH4)x solutions in the interval 2–40 K, x = 0–1, are reported. The temperature dependences K(T) taken in the solutions in concentrated orientationally-ordered and orientationally-disordered phases have features that are not typical of dielectric crystals. It is shown that the anomalous K(T) is caused by strong single-phonon resonance scattering at a weakly hindered quantum rotor–the CH4 molecule with the nuclear spin I = 1. (© 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
