We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Phonon heat transport in gallium arsenide.
- Authors
SAINI, RICHA; ASHOKAN, VINOD; INDU, B; KUMAR, R
- Abstract
The lifetimes of quantum excitations are directly related to the electron and phonon energy linewidths of a particular scattering event. Using the versatile double time thermodynamic Green's function approach based on many-body theory, an ab-initio formulation of relaxation times of various contributing processes has been investigated with newer understanding in terms of the linewidths of electrons and phonons. The energy linewidth is found to be an extremely sensitive quantity in the transport phenomena of crystalline solids as a collection of large number of scattering processes, namely, boundary scattering, impurity scattering, multiphonon scattering, interference scattering, electron-phonon processes and resonance scattering. The lattice thermal conductivities of three samples of GaAs have been analysed on the basis of modified Callaway model and a fairly good agreement between theory and experimental observations has been reported.
- Subjects
THERMODYNAMICS; PHONONS; HEAT transfer; EFFECT of radiation on gallium arsenide; ELECTRONIC excitation; ELECTRON scattering; PHONON scattering; ATOMIC theory
- Publication
Pramana: Journal of Physics, 2012, Vol 78, Issue 3, p459
- ISSN
0304-4289
- Publication type
Article
- DOI
10.1007/s12043-011-0248-3