Enhanced Boson peak in Pr-doped Ge-S-I glasses with varying composition and Pr-content

Tikhomirov, VK; Kotsalas, IP; Raptis, C; Parshin, DA

dc.contributor.author	Tikhomirov, VK	en
dc.contributor.author	Kotsalas, IP	en
dc.contributor.author	Raptis, C	en
dc.contributor.author	Parshin, DA	en
dc.date.accessioned	2014-03-01T01:13:43Z
dc.date.available	2014-03-01T01:13:43Z
dc.date.issued	1998	en
dc.identifier.issn	0038-1098	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/12685
dc.subject	A. Disordered systems	en
dc.subject	D. Phonons	en
dc.subject	E. Inelastic light scattering	en
dc.subject.classification	Physics, Condensed Matter	en
dc.subject.other	Doping (additives)	en
dc.subject.other	Germanium compounds	en
dc.subject.other	Molecular vibrations	en
dc.subject.other	Phonons	en
dc.subject.other	Positive ions	en
dc.subject.other	Praseodymium	en
dc.subject.other	Raman scattering	en
dc.subject.other	Boson peak	en
dc.subject.other	Germanium sulfur iodide	en
dc.subject.other	Optical glass	en
dc.title	Enhanced Boson peak in Pr-doped Ge-S-I glasses with varying composition and Pr-content	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0038-1098(98)00010-6	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0038-1098(98)00010-6	en
heal.language	English	en
heal.publicationDate	1998	en
heal.abstract	Raman scattering from Ge-rich, undoped and Pr-doped Ge-S-I glasses is reported over the spectral range 5-450 cm(-1). In the region of molecular vibrations, apart from the bands of the Ge-S binary glassy system, an additional band at 222 cm(-1) has been observed and assigned to I vibrations in terminating Ge-I bonds. A well-resolved, strong Boson peak has also been observed at similar to 26 cm(-1) in all samples, the intensity of which increases with increasing I-content. The strength of this peak is associated with the large atomic mass and polarizability of I, and its frequency is connected with the medium range order of the glass. Doping with Pr3+ results in further enhancement of the Boson peak, indicating that Pr ions are incorporated mainly into regions of the glass responsible for the collective modes producing this peak. Measured lineshape characteristics on both sides of the Boson peak are in satisfactory agreement with the predicted ones by the soft potential model [Gurevich ed al., Phys. Rev., B48, 1993, 16318]. (C) 1998 Elsevier Science Ltd. All rights reserved.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	Solid State Communications	en
dc.identifier.doi	10.1016/S0038-1098(98)00010-6	en
dc.identifier.isi	ISI:000072746200006	en
dc.identifier.volume	106	en
dc.identifier.issue	3	en
dc.identifier.spage	145	en
dc.identifier.epage	148	en