Low Temperature Physics: 42, 636 (2016); https://doi.org/10.1063/1.4962149
Fizika Nizkikh Temperatur: Volume 42, Number 8 (August 2016), p. 809-840    ( to contents , go back )

The role of the conduction electrons in the formation of a thermal boundary resistance of the metal-dielectric interface and resistivity of the metal films at low temperatures (Review Article)

A.I. Bezuglyj

National Science Center “Kharkov Institute of Physics and Technology” 1 Akademicheskaya Str., Kharkov 61108, Ukraine
E-mail: bezuglyj@kipt.kharkov.ua

V.A. Shklovskij

V. N. Karazin National University, Kharkiv 61077, Ukraine
pos Анотація:

Received March 16, 2016

Abstract

In a review in the framework of the theory of the acoustic mismatch between solids we discuss the role of the conduction electrons in the formation of an effective acoustic transparency of the interface be-tween narrow metal films and dielectric substrates with high thermal conductivity. We consider both stationary and non-stationary regimes of the phonons radiation from metallic films heated by electric current or short laser pulses at low temperatures. We discussed in detail how the energy relaxation of electrons by phonons τe and the average exit time of the phonons from the film τes can be found from the experiment. A theoretical analysis of these problems is carried out using the kinetic equations for the phonon and electron distribution functions. The stationary regimes of relaxation and diffusion heat removal from the moving flat front phase transformation in the film geometry are considered. In most cases we discuss the connection between the theoretical results of the authors and the existing experimental situation.

PACS: 66.70.–f Nonelectronic thermal conduction and heat-pulse propagation in solids; thermal waves;
PACS: 72.15.Lh Relaxation times and mean free paths;
PACS: 73.50.–h Electronic transport phenomena in thin films;
PACS: 64.70.K– Solid-solid transitions.

Key words: metal films, non-stationary heating, electron-phonon kinetics.

Published online: June 24, 2016

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