The Raman spectra of the hexagonal and cubic (spinel) forms of Ge3N4: an experimental and theoretical study

Authors
Deb, SK Dong, J Hubert, H McMillan, PF Sankey, OF
Citation
Sk. Deb et al., The Raman spectra of the hexagonal and cubic (spinel) forms of Ge3N4: an experimental and theoretical study, SOL ST COMM, 114(3), 2000, pp. 137-142
Citations number
9
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
SOLID STATE COMMUNICATIONS
ISSN journal
00381098 → ACNP
Volume
114
Issue
3
Year of publication
2000
Pages
137 - 142
Database
ISI
SICI code
0038-1098(2000)114:3<137:TRSOTH>2.0.ZU;2-P
Abstract
The Raman spectra of the hexagonal (beta) and cubic spinel (gamma) forms of Ge3N4, newly obtained by high-pressure synthesis, have been measured and a re compared with zone-center phonon frequencies calculated using first prin ciples methods in a plane wave pseudopotential local density approximation. The observed and calculated phonon frequencies are in excellent agreement and we use the calculated values to perform mode assignment for both the ph ases. Both phases show all the expected Raman active modes. (C) 2000 Elsevi er Science Ltd. All rights reserved.