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This article is cited in 2 scientific papers (total in 2 papers)
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Anisotropy of the mean free paths of phonons in single-crystal films of germanium, silicon, and diamond at low temperatures
I. I. Kuleyev Institute of Metal Physics, Ural Division of the Russian Academy of Sciences, Ekaterinburg
Abstract:
The physical aspects of the influence of the elastic energy anisotropy of crystals on the anisotropy of the mean free paths of phonons in single-crystal films of germanium, silicon, and diamond in the diffuse scattering of phonons at the boundaries of the samples have been considered. It has been shown that, for sufficiently wide films of germanium, silicon, and diamond with the $\{100\}$ and $\{111\}$ orientations and the lengths of less than or equal to their width, the phonon mean free paths are isotropic (independent of the direction of the temperature gradient in the plane of the film). The anisotropy of the phonon mean free paths depends primarily on the orientation of the film plane and is determined by the focusing and defocusing of phonon modes. For single-crystal films of germanium, silicon, and diamond with the
$\{100\}$ and $\{111\}$ orientations and lengths much larger than their width, the phonon mean free paths are anisotropic.
Received: 13.07.2016
Citation:
I. I. Kuleyev, “Anisotropy of the mean free paths of phonons in single-crystal films of germanium, silicon, and diamond at low temperatures”, Fizika Tverdogo Tela, 59:4 (2017), 668–678; Phys. Solid State, 59:4 (2017), 682–693
Linking options:
https://www.mathnet.ru/eng/ftt9604 https://www.mathnet.ru/eng/ftt/v59/i4/p668
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