| Numéro |
J. Phys. Colloques
Volume 42, Numéro C6, Décembre 1981
International Conference on Phonon Physics
|
|
|---|---|---|
| Page(s) | C6-643 - C6-645 | |
| DOI | https://doi.org/10.1051/jphyscol:19816187 | |
International Conference on Phonon Physics
J. Phys. Colloques 42 (1981) C6-643-C6-645
DOI: 10.1051/jphyscol:19816187
1 Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, U.S.A.
2 Bell Laboratories, Murray Hill , NJ 07974
3 Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, U. S. A.
J. Phys. Colloques 42 (1981) C6-643-C6-645
DOI: 10.1051/jphyscol:19816187
SECOND ORDER RAMAN SCATTERING IN CRYSTALLINE SULPHUR SELENIUM AND TELLURIM
P.J. Carroll1, 2 et J.S. Lannin31 Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, U.S.A.
2 Bell Laboratories, Murray Hill , NJ 07974
3 Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, U. S. A.
Abstract
The second order Raman spectrum of orthorhombic (o-) S is reported and compared with the spectrum of monoclinic (m-) Se. The spectra of these ring systems exhibit very similar structure. Three regions of scattering are observed, two of which suggest a predominance of overtone scattering. The features of the other region arise from combination processes. A comparison between the high frequency bands of trigonal(t-) Te, t-Se, m-Se and o-S is also presented. Differences in these spectra are qualitatively explained in terms of the molecular unit of the crystal (ring or chain) and changes in inter-unit and intra-unit coupling.