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D. A. Romanov, J. Eizenkop, V. V. Mitin, "Dynamics of Non-equilibrium Short-wave-length Phonons in Semiconductor Heterostructures", VLSI Design, vol. 13, Article ID 024532, 5 pages, 2001. https://doi.org/10.1155/2001/24532
Dynamics of Non-equilibrium Short-wave-length Phonons in Semiconductor Heterostructures
The behavior of short-wave-length acoustic phonons in the vicinity of a quantum well in a GaAs/AlGaAs heterostructure has been investigated. Hot two-dimensional electrons in the well produce longitudinal optical phonons, which decay into almost monoenergetic short-wave-length longitudinal acoustic (LA) phonons. The latter undergo elastic scattering and down-conversion into transverse acoustic (TA) phonons. The distribution of the LA and TA phonons over frequency and distance to the well have been found by solving semi-analytically a system of two kinetic equations with nontrivial boundary conditions and nonlinear dispersion. The distribution functions have essentially non-temperature form even at substantial distance from the well.
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