The Boson Peak and its Relation with Acoustic Attenuation in Glasses

Details The Boson Peak and its Relation with Acoustic Attenuation in Glasses The Boson Peak and its Relation with Acoustic Attenuation in Glasses

2007-11-03

arxiv.org/abs/0711.0461v1

Phys. Rev. Lett. 100, 015501 (2008)

Physics

Condensed Matter

Disordered Systems and Neural Networks

4 pages, 3 figures, Physical Review Letters in press

Scientific paper

10.1103/PhysRevLett.100.015501

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.

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