Inelastic neutron and low-frequency Raman scattering in niobium-phosphate glasses: the role of spatially fluctuating elastic and elasto-optic constants

Journal article


Publication Details

Author(s): Schulte A, Schirmacher W, Schmid B, Unruh T
Journal: Journal of Physics: Condensed Matter
Publisher: IOP PUBLISHING LTD
Publication year: 2011
Volume: 23
Journal issue: 25
ISSN: 0953-8984
eISSN: 1361-648X


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 150 cm(-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.



FAU Authors / FAU Editors

Unruh, Tobias Prof. Dr.
Professur für Nanomaterialcharakterisierung (Streumethoden)


External institutions with authors

Johannes Gutenberg-Universität Mainz
Technische Universität München (TUM)
University of Central Florida (UCF)


How to cite

APA:
Schulte, A., Schirmacher, W., Schmid, B., & Unruh, T. (2011). Inelastic neutron and low-frequency Raman scattering in niobium-phosphate glasses: the role of spatially fluctuating elastic and elasto-optic constants. Journal of Physics: Condensed Matter, 23(25). https://dx.doi.org/10.1088/0953-8984/23/25/254212

MLA:
Schulte, Alfons, et al. "Inelastic neutron and low-frequency Raman scattering in niobium-phosphate glasses: the role of spatially fluctuating elastic and elasto-optic constants." Journal of Physics: Condensed Matter 23.25 (2011).

BibTeX: 

Last updated on 2018-06-08 at 20:12