| Numéro |
J. Phys. Colloques
Volume 42, Numéro C6, Décembre 1981
International Conference on Phonon Physics
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|
|---|---|---|
| Page(s) | C6-128 - C6-130 | |
| DOI | https://doi.org/10.1051/jphyscol:1981638 | |
International Conference on Phonon Physics
J. Phys. Colloques 42 (1981) C6-128-C6-130
DOI: 10.1051/jphyscol:1981638
Department of Physics, University of California, Irvine, California 92717, U.S.A.
J. Phys. Colloques 42 (1981) C6-128-C6-130
DOI: 10.1051/jphyscol:1981638
HARMONIC AND ANHARMONIC PROPERTIES OF SILICON
K.H. Wanser et R.F. WallisDepartment of Physics, University of California, Irvine, California 92717, U.S.A.
Abstract
Silicon has interesting harmonic and anharmonic properties such as the low-lying transverse acoustic modes at the X and L points of the Brillouin zone, negative Gruneisen parameters, negative thermal expansion and anomalous acoustic attenuation. In an attempt to understand these properties, we have developed a lattice dynamical model for silicon employing long-range, non-local, dipole-dipole interactions. Several interesting features of this interaction are found and discussed. We present analytic expressions for the Gruneisen parameters that explain how the negative Gruneisen parameters arise. Application of this model to the calculation of the thermal expansion of silicon is made.