Low-frequency lattice vibrations of δ-GaSe compared to ϵ- and γ-polytypes

Autor:	Arno Kuhn, Karel Kunc, Alain Polian
Rok vydání:	1976
Předmět:	symbols.namesake Condensed matter physics Chemistry Phonon Lattice (order) Materials Chemistry symbols Lattice vibration General Chemistry Low frequency Condensed Matter Physics Raman spectroscopy
Zdroj:	Solid State Communications. 19:1079-1082
ISSN:	0038-1098
Popis:	Raman spectra of the new polytype 5-GaSe are given in the low-frequency region (co < 60 cm-1) and their relation to lattice vibrations of the simpler polytypes 3', e is discussed. A simple lattice dynamical model is used to describe the phonon modes in all 3 modifications. First observation of Davydov splitting in e-GaSe is reported. Particular weakness of one component of this doublet is shown to be a consequence of the specific "molecular" nature of layer crystal.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::21db9dca90270ee7e839103848cb7d29 https://doi.org/10.1016/0038-1098(76)90102-2 Zobrazit plný text záznamu