ANHARMONIC EFFECTS IN Mg//2X (X equals Si, Ge, Sn) COMPOUNDS STUDIED BY RAMAN SPECTROSCOPY.

Raptis, YS; Kourouklis, GA; Anastassakis, E; Haro-Poniatowski, E; Balkanski, M

dc.contributor.author	Raptis, YS	en
dc.contributor.author	Kourouklis, GA	en
dc.contributor.author	Anastassakis, E	en
dc.contributor.author	Haro-Poniatowski, E	en
dc.contributor.author	Balkanski, M	en
dc.date.accessioned	2014-03-01T01:39:12Z
dc.date.available	2014-03-01T01:39:12Z
dc.date.issued	1987	en
dc.identifier.issn	03020738	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/22606
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0023291639&partnerID=40&md5=57985f6cffdd0f7015f72c68e70e459f	en
dc.subject.other	RAMAN SCATTERING - Spectrum Analysis	en
dc.subject.other	FIRST-ORDER RAMAN SCATTERING	en
dc.subject.other	FREQUENCY SHIFT	en
dc.subject.other	LATTICE ANHARMONICITY	en
dc.subject.other	TEMPERATURE/PRESSURE EFFECT	en
dc.subject.other	MAGNESIUM COMPOUNDS	en
dc.title	ANHARMONIC EFFECTS IN Mg//2X (X equals Si, Ge, Sn) COMPOUNDS STUDIED BY RAMAN SPECTROSCOPY.	en
heal.type	journalArticle	en
heal.publicationDate	1987	en
heal.abstract	Measurements of the first-order Raman scattering of Mg//2X (X equals Si, Ge, Sn) as a function of temperature and pressure are presented. The volume contribution (implicit effect) to the frequency shift with temperature is computed and compared to the lattice-anharmonicity contribution (explicit effect). The latter contribution turns out to be larger than the former. The values of the implicit fraction (ratio of the volume to the total effect) for all three materials are found to be smaller than 0. 5 and to depend on temperature. These findings are indicative of a predominantly covalent bonding in these materials.	en
heal.journalName	Journal de physique Paris	en
dc.identifier.volume	48	en
dc.identifier.issue	2	en
dc.identifier.spage	239	en
dc.identifier.epage	245	en