Inelastic neutron and low-frequency Raman scattering in niobium-phosphate glasses: the role of spatially fluctuating elastic and elasto-optic constants
Schulte A, Schirmacher W, Schmid B, Unruh T (2011)
Publication Status: Published
Publication Type: Journal article
Publication year: 2011
Journal
Publisher: IOP PUBLISHING LTD
Book Volume: 23
Journal Issue: 25
DOI: 10.1088/0953-8984/23/25/254212
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.
Authors with CRIS profile
Involved external institutions
University of Central Florida (UCF)
United States (USA) (US)
Technische Universität München (TUM)
Germany (DE)
Johannes Gutenberg-Universität Mainz (JGU)
Germany (DE)
United States (USA) (US)
Technische Universität München (TUM)
Germany (DE)
Johannes Gutenberg-Universität Mainz (JGU)
Germany (DE)
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: Download