Hyper-Raman Scattering Observation of the Boson Peak in Vitreous Silica

B. Hehlen; E. Courtens; R. Vacher; A. Yamanaka; M. Kataoka; K. Inoue

doi:10.1103/PhysRevLett.84.5355

Hyper-Raman Scattering Observation of the Boson Peak in Vitreous Silica

B. Hehlen, E. Courtens, R. Vacher, A. Yamanaka, M. Kataoka, and K. Inoue

Phys. Rev. Lett. 84, 5355 – Published 5 June 2000

Abstract

Hyper-Raman spectroscopy is used to investigate low frequency vibrations of various silica glasses. A strong boson peak is observed. The corresponding modes are inactive in infrared and Raman spectra, and are nonacoustic in nature. The shape of this boson peak essentially matches the total density of vibrational states (DOS), with a constant coupling coefficient $C$ . This and other indications suggest that these modes actually dominate the DOS of silica.

Received 25 January 2000

DOI:https://doi.org/10.1103/PhysRevLett.84.5355

Authors & Affiliations

B. Hehlen¹, E. Courtens¹, R. Vacher¹, A. Yamanaka^2,3, M. Kataoka², and K. Inoue²

¹Laboratoire des Verres, UMR 5587 CNRS, Université Montpellier 2, F-34095 Montpellier, France
²Research Institute for Electronic Science, Hokkaido University, Sapporo 060-0812, Japan
³Chitose Institute of Science and Technology, Chitose 066-8655, Hokkaido, Japan