Temperature evolution of the boson peak and Debye scaling in vitreous B₂O₃

Abstract

We present a Raman scattering study of B₂O₃ as a function of temperature. Measurements have been done from liquid helium temperature up to the supercooled liquid state. We found that the shift in the boson peak could be completely ascribed to the temperature induced elastic medium transformation and we do not need the introduction of other mechanisms. Furthermore we show also in this system that the boson peak spectral shape is invariant.

Keywords:

• glasses
• boson peak
• elastic medium transformation
• Raman light scattering