RAMAN AND INFRARED SPECTRA OF TELLURIUM SUB-BROMIDE (Te//2Br).

Anastassakis, E; Raptis, JS; Richter, W

dc.contributor.author	Anastassakis, E	en
dc.contributor.author	Raptis, JS	en
dc.contributor.author	Richter, W	en
dc.date.accessioned	2014-03-01T01:06:28Z
dc.date.available	2014-03-01T01:06:28Z
dc.date.issued	1985	en
dc.identifier.issn	0370-1972	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/9402
dc.subject	Infrared Spectra	en
dc.subject.classification	Physics, Condensed Matter	en
dc.subject.other	PHONONS	en
dc.subject.other	SPECTROSCOPY, INFRARED - Applications	en
dc.subject.other	SPECTROSCOPY, RAMAN - Applications	en
dc.subject.other	LO FREQUENCIES	en
dc.subject.other	OSCILLATOR STRENGTHS	en
dc.subject.other	TELLURIUM SUBBROMIDE	en
dc.subject.other	TELLURIUM COMPOUNDS	en
dc.title	RAMAN AND INFRARED SPECTRA OF TELLURIUM SUB-BROMIDE (Te//2Br).	en
heal.type	journalArticle	en
heal.identifier.primary	10.1002/pssb.2221300113	en
heal.identifier.secondary	http://dx.doi.org/10.1002/pssb.2221300113	en
heal.language	English	en
heal.publicationDate	1985	en
heal.abstract	Raman and IR spectroscopic techniques are used to study the long-wavelength optical phonons of tellurium sub-bromide (orthorhombic structure). By use of an appropriate range of temperatures and excitation wavelengths the frequencies for nearly all of the A//2 and B//2 q approximately equals 0 optical phonons are determined. Oscillator strengths and LO-frequencies for these phonons are obtained from the fitting of IR reflection spectra with a multiple oscillator model. The temperature dependence of the frequency and damping constant for some of these phonons is discussed. A remarkable features of this material is the existence of low frequency ( approximately equals 20 cm minus 1) phonons with extremely large polarizabilities ( DELTA // chi up to 150).	en
heal.publisher	AKADEMIE VERLAG GMBH	en
heal.journalName	Physica Status Solidi (B) Basic Research	en
dc.identifier.doi	10.1002/pssb.2221300113	en
dc.identifier.isi	ISI:A1985AND7300013	en
dc.identifier.volume	130	en
dc.identifier.issue	1	en
dc.identifier.spage	161	en
dc.identifier.epage	168	en