Dynamics of Non-equilibrium Short-wave-length Phonons in Semiconductor Heterostructures
Abstract
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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jan 01, 2001
- Source ID
- 10.1155/2001/24532
Entities
People
- D. A. Romanov
- J. Eizenkop
- Vladimir Mitin
Organizations
- Army Research Office
- Wayne State University