Experimental results on the density of states and on the acoustic modes of glasses in the THz region are compared to the predictions of two categories of models. A recent one, solely based on an elastic instability, does not account for most observations. Good agreement without adjustable parameters is obtained with models including the existence of non-acoustic vibrational modes at THz frequency, providing in many cases a comprehensive picture for a range of glass anomalies.
@article{arxiv.0711.0461,
title = {The Boson Peak and its Relation with Acoustic Attenuation in Glasses},
author = {B. Rufflé and D. A. Parshin and E. Courtens and R. Vacher},
journal= {arXiv preprint arXiv:0711.0461},
year = {2011}
}
Comments
4 pages, 3 figures, Physical Review Letters in press