Title

Inelastic Neutron And Low-Frequency Raman Scattering In Niobium-Phosphate Glasses: The Role Of Spatially Fluctuating Elastic And Elasto-Optic Constants

Abstract

We investigate the low-frequency enhancement of vibrational excitations ('boson peak') in niobium-phosphate glasses through the combination of inelastic neutron and polarization-resolved Raman scattering. The spectra of these glasses reveal an enhancement of the vibrational density of states and of the cross section for spontaneous Raman scattering in the frequency range below 150cm- 1. A recent theoretical model that is based on fluctuating elastic and elasto-optic (Pockels) constants provides a unified description of the measured neutron and Raman spectra, including the depolarization ratio. © 2011 IOP Publishing Ltd.

Publication Date

6-29-2011

Publication Title

Journal of Physics Condensed Matter

Volume

23

Issue

25

Number of Pages

-

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1088/0953-8984/23/25/254212

Socpus ID

79960029985 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/79960029985

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