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

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autor(en): Schulte A, Schirmacher W, Schmid B, Unruh T
Zeitschrift: Journal of Physics: Condensed Matter
Verlag: IOP PUBLISHING LTD
Jahr der Veröffentlichung: 2011
Band: 23
Heftnummer: 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-Autoren / FAU-Herausgeber

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


Autor(en) der externen Einrichtung(en)
Johannes Gutenberg-Universität Mainz
Technische Universität München (TUM)
University of Central Florida (UCF)


Zitierweisen

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: 

Zuletzt aktualisiert 2018-06-08 um 20:12

Link teilen