Low Temperature Physics: 38, 1055 (2012); https://doi.org/10.1063/1.4765094 (3 pages)
Fizika Nizkikh Temperatur: Volume 38, Number 11 (November 2012), p. 1336-1339    ( to contents , go back )

On the low-temperature anomalies in the thermal conductivity of plastically deformed crystals due to phonon-kink scattering

J.A.M. van Ostaay1, S.I. Mukhin2, and L.P. Mezhov-Deglin3

1Instituut-Lorentz, Universiteit Leiden, P.O. Box 9506, 2300 RA Leiden, The Netherlands

2Theoretical Physics and Quantum Technologies Department, NITU MISIS, 119991 Moscow, Russia
E-mail: i.m.sergei.m@gmail.com

3Institute of Solid State Physics RAS, 2 Institutskaia Str., 142432 Chernogolovka, Russia

Received August 31, 2012


Previous experimental studies of the thermal conductivity of plastically deformed lead crystals in the superconducting state have shown strong anomalies in the thermal conductivity. Similar effects were also found for the thermal conductivity of bent 4He samples. Until now, a theoretical explanation for these results was missing. In this paper we will introduce the process of phonon–kink scattering and show that it qualitatively explains the anomalies that experiments had found.

PACS: 72.10.–d Theory of electronic transport; scattering mechanisms;
PACS: 72.15.Eb Electrical and thermal conduction in crystalline metals and alloys;
PACS: 66.70.–f Nonelectronic thermal conduction and heat-pulse propagation in solids; thermal waves;
PACS: 61.72.Lk Linear defects: dislocations, disclinations;
PACS: 67.80.–s Quantum solids.

Key words: phonon thermal transport, low temperatures, kinks on dislocation line, phonon–kink scattering anomaly.

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