Phonons in GdS-Raman scattering of an fcc metal

Guntherodt, G; Grunberg, P; Anastassakis, E; Cardona, M; Hackfort, H; Zinn, W

dc.contributor.author	Guntherodt, G	en
dc.contributor.author	Grunberg, P	en
dc.contributor.author	Anastassakis, E	en
dc.contributor.author	Cardona, M	en
dc.contributor.author	Hackfort, H	en
dc.contributor.author	Zinn, W	en
dc.date.accessioned	2014-03-01T01:37:51Z
dc.date.available	2014-03-01T01:37:51Z
dc.date.issued	1977	en
dc.identifier.issn	01631829	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/21786
dc.title	Phonons in GdS-Raman scattering of an fcc metal	en
heal.type	journalArticle	en
heal.identifier.primary	10.1103/PhysRevB.16.3504	en
heal.identifier.secondary	http://dx.doi.org/10.1103/PhysRevB.16.3504	en
heal.publicationDate	1977	en
heal.abstract	Metallic, fcc GdS was investigated by means of Raman scattering. First- and second-order Raman scattering was observed and identified by the dependence on temperature and defect concentration. Particular consideration was given to the effect of sample stoichiometry on the Raman spectra. The symmetry-forbidden first-order scattering is found to be defect induced, in contrast to the defect-independent, allowed, second-order scattering. The observed defect-induced one-phonon density of states was assigned to acoustical and optical branches. Raman scattering of GdS provides information about the phonon spectrum which cannot be obtained from neutron scattering or infrared spectroscopy. The antiferromagnetic order of GdS is found to have no effect on the Raman scattering, which is attributed to the nonresonant excitation of the 4f7 states at about 7 eV below the Fermi level. © 1977 The American Physical Society.	en
heal.journalName	Physical Review B	en
dc.identifier.doi	10.1103/PhysRevB.16.3504	en
dc.identifier.volume	16	en
dc.identifier.issue	8	en
dc.identifier.spage	3504	en
dc.identifier.epage	3512	en