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Title: Influence of Focusing on Phonon Propagation and Thermal Conductivity in Single Crystal Films with Different Types of Anisotropy of Elastic Energy

Abstract

The influence of the anisotropy of elastic energy on the phonon propagation and phonon transport in single crystal nanofilms with different types of anisotropy of elastic energy in a Knudsen flow of a phonon gas is studied. The angular distribution of phonon mean free paths in the planes of the films and in their cross section is analyzed. The physical reasons leading to the dependence of the thermal conductivity on the orientation of the film planes and the directions of the heat flux relative to the crystal axes are studied. An analysis of the effect of focusing on the phonon propagation made it possible to explain the qualitative difference between the anisotropy of phonon mean free paths in films of cubic nanocrystals of various types having different orientations of the planes.

Authors:
 [1]
  1. Russian Academy of Sciences, Institute of Metal Physics, Ural Branch (Russian Federation)
Publication Date:
OSTI Identifier:
22771126
Resource Type:
Journal Article
Journal Name:
Physics of the Solid State
Additional Journal Information:
Journal Volume: 60; Journal Issue: 5; Other Information: Copyright (c) 2018 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1063-7834
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ANGULAR DISTRIBUTION; ANISOTROPY; CROSS SECTIONS; ELASTICITY; FILMS; HEAT FLUX; KNUDSEN FLOW; MEAN FREE PATH; MONOCRYSTALS; NANOSTRUCTURES; ORIENTATION; PHONONS; THERMAL CONDUCTIVITY

Citation Formats

Kuleev, I. I., E-mail: kuleyevII@imp.uran.ru. Influence of Focusing on Phonon Propagation and Thermal Conductivity in Single Crystal Films with Different Types of Anisotropy of Elastic Energy. United States: N. p., 2018. Web. doi:10.1134/S1063783418050141.
Kuleev, I. I., E-mail: kuleyevII@imp.uran.ru. Influence of Focusing on Phonon Propagation and Thermal Conductivity in Single Crystal Films with Different Types of Anisotropy of Elastic Energy. United States. doi:10.1134/S1063783418050141.
Kuleev, I. I., E-mail: kuleyevII@imp.uran.ru. Tue . "Influence of Focusing on Phonon Propagation and Thermal Conductivity in Single Crystal Films with Different Types of Anisotropy of Elastic Energy". United States. doi:10.1134/S1063783418050141.
@article{osti_22771126,
title = {Influence of Focusing on Phonon Propagation and Thermal Conductivity in Single Crystal Films with Different Types of Anisotropy of Elastic Energy},
author = {Kuleev, I. I., E-mail: kuleyevII@imp.uran.ru},
abstractNote = {The influence of the anisotropy of elastic energy on the phonon propagation and phonon transport in single crystal nanofilms with different types of anisotropy of elastic energy in a Knudsen flow of a phonon gas is studied. The angular distribution of phonon mean free paths in the planes of the films and in their cross section is analyzed. The physical reasons leading to the dependence of the thermal conductivity on the orientation of the film planes and the directions of the heat flux relative to the crystal axes are studied. An analysis of the effect of focusing on the phonon propagation made it possible to explain the qualitative difference between the anisotropy of phonon mean free paths in films of cubic nanocrystals of various types having different orientations of the planes.},
doi = {10.1134/S1063783418050141},
journal = {Physics of the Solid State},
issn = {1063-7834},
number = 5,
volume = 60,
place = {United States},
year = {2018},
month = {5}
}