On the scattering mechanisms responsible for the Boson peak in glasses

Tikhomirov, VK; Sarantopoulou, E; Perakis, A; Raptis, C

dc.contributor.author	Tikhomirov, VK	en
dc.contributor.author	Sarantopoulou, E	en
dc.contributor.author	Perakis, A	en
dc.contributor.author	Raptis, C	en
dc.date.accessioned	2014-03-01T01:14:56Z
dc.date.available	2014-03-01T01:14:56Z
dc.date.issued	1999	en
dc.identifier.issn	0038-1098	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/13278
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	Light scattering	en
dc.subject.other	Phonons	en
dc.subject.other	Raman spectroscopy	en
dc.subject.other	Sulfur compounds	en
dc.subject.other	Boson peak	en
dc.subject.other	Inelastic light scattering	en
dc.subject.other	Glass	en
dc.title	On the scattering mechanisms responsible for the Boson peak in glasses	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0038-1098(98)00517-1	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0038-1098(98)00517-1	en
heal.language	English	en
heal.publicationDate	1999	en
heal.abstract	A well-resolved Boson peak has been observed in the Raman spectra of sulphide and sulphurhalide glasses and its temperature dependence is studied in the range 20-300 K. The variation of the spectral profile of the Boson peak with temperature, which is manifested by a non-monotonic variation of slope at the low energy side of the peak and a continuously increasing asymmetry of the peak with decreasing temperature, suggests the presence of two vibrational scattering components which vary in different ways with temperature. The existence of two such contributions is discussed in terms of a qualitative model which assumes an asymmetrical double well potential of vibrational states. A decrease of the crossover frequency od (defined by the low and high energy slopes of the Boson peak) with decreasing temperature is in agreement with the theory of the soft potential model for which an increase of the relative population of non-interacting to interacting harmonic oscillators is expected with decreasing temperature. (C) 1999 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)00517-1	en
dc.identifier.isi	ISI:000078562400013	en
dc.identifier.volume	109	en
dc.identifier.issue	6	en
dc.identifier.spage	433	en
dc.identifier.epage	438	en