Hydrostatic pressure effects on TO–LO splitting and softening of infrared active phonons in α‐quartz
| Autor: | F. L. Baudais, Patrick T. T. Wong, D. J. Moffatt |
|---|---|
| Rok vydání: | 1986 |
| Předmět: |
Condensed matter physics
Infrared Chemistry Phonon Hydrostatic pressure General Physics and Astronomy Infrared spectroscopy Crystal structure Effective nuclear charge Condensed Matter::Materials Science Condensed Matter::Superconductivity Condensed Matter::Strongly Correlated Electrons Physical and Theoretical Chemistry Softening Quartz |
| Zdroj: | The Journal of Chemical Physics. 84:671-674 |
| ISSN: | 1089-7690 0021-9606 |
| DOI: | 10.1063/1.450563 |
| Popis: | Infrared spectra of crystalline α‐quartz have been measured as a function of pressure up to 50.3 kbar. Pressure induced large frequency shifts, increase in TO–LO splittings and ‘‘softening’’ in various phonon bands have been observed. The pressure dependences of the mode Gruneisen parameters for selected phonons have been calculated. The results are discussed in terms of the pressure induced changes in crystal structure and Szigeti effective charge. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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