Raman Scattering of Trigonal Se and Te at Very High Pressure
| Autor: | Tachiro Tsushima, Katsutoshi Aoki, Osamu Shimomura, Naoki Koshizuka, Shigeru Minomura |
|---|---|
| Rok vydání: | 1980 |
| Předmět: |
Materials science
Condensed matter physics General Physics and Astronomy Trigonal crystal system Low frequency Condensed Matter::Materials Science symbols.namesake Crystallography Covalent bond Lattice (order) symbols Condensed Matter::Strongly Correlated Electrons Raman spectroscopy Softening Raman scattering Monoclinic crystal system |
| Zdroj: | Journal of the Physical Society of Japan. 48:906-911 |
| ISSN: | 1347-4073 0031-9015 |
| Popis: | The first-order Raman spectra of trigonal Se and Te have been measured under pressure up to the semiconductor-metal transition points at room temperature. In both materials, a prominent pressure effect is found as an anomalous shift of the A 1 mode to low frequency. This softening indicates interference of the interchain bonding with the intrachain covalent bond. Frequency shifts with pressure show deviations from the lattice dynamical homology of Se and Te. The results are interpreted as aspects of the transition to the puckered layer structure of the high-pressure monoclinic phase of Te. |
| Databáze: | OpenAIRE |
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