Raman coupling-parameter variation in amorphous germanium
- 15 February 1987
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 35 (5), 2456-2459
- https://doi.org/10.1103/physrevb.35.2456
Abstract
Inelastic neutron and Raman scattering measurements on amorphous Ge are combined to obtain the frequency variation of the depolarized and fully polarized Raman coupling parameters, (ω). These measurements were obtained on two forms of a-Ge chosen so as to maximize differences in the degrees of local short-range order. For both highly ordered and highly disordered forms of a-Ge the variation of (ω) is found to be qualitatively similar in overall form, although quantitative differences exist, particularly at low frequencies. The results provide a means of determining the phonon density of states of other forms of a-Ge thin films for which neutron measurements are not feasible. Qualitatively similar variations in (ω) for a-Si are also predicted.
Keywords
This publication has 20 references indexed in Scilit:
- Determination of energy barrier for structural relaxation in a-Si and a-Ge by Raman scatteringJournal of Non-Crystalline Solids, 1984
- Structural order and optical properties of tetrahedral amorphous solidsPhysica B+C, 1983
- Second-order Raman scattering in non-crystalline materials: Amorphous SePhilosophical Magazine Part B, 1982
- Structural and vibrational properties of amorphous phosphorusPhysical Review B, 1981
- Low-frequency inelastic light scattering from chalcogenide glasses and alloysPhysical Review B, 1977
- Raman scattering properties of amorphous As and SbPhysical Review B, 1977
- Vibrational properties of amorphous and two crystalline modifications of arsenic as determined by inelastic neutron scatteringPhilosophical Magazine, 1976
- Model for Brillouin Scattering in Amorphous SolidsPhysica Status Solidi (b), 1974
- Low-Temperature Heat Capacity of Amorphous GermaniumPhysical Review Letters, 1974
- Low frequency coupling constants for Raman scattering in amorphous solidsSolid State Communications, 1973