TY - JOUR
T1 - Potential energy, relaxation, vibrational dynamics and the boson peak, of hyperquenched glasses
AU - Angell, Charles
AU - Yue, Yuanzheng
AU - Wang, Li Min
AU - Copley, John R D
AU - Borick, Steve
AU - Mossa, Stefano
N1 - Copyright:
Copyright 2004 Elsevier Science B.V., Amsterdam. All rights reserved.
PY - 2003/3/26
Y1 - 2003/3/26
N2 - Laboratory and simulation studies were performed, making it possible to obtain quantitative information on the energy landscape for glass-forming liquids. Focus was on the idea of suddenly extracting the thermal energy, so that the system obtained for subsequent study has the structure, and hence potential energy, of a liquid at a much higher temperature than the normal glass temperature. Results show that, when the temperature is raised at constant pressure, the total density of states changes in a manner that can be well represented by a two-Gaussian excitation across the centroid, leaving a third and major Gaussian component unchanging. The low frequency Gaussian component has a constant peak frequency of 18 cm-1 and is identified with the Boson peak.
AB - Laboratory and simulation studies were performed, making it possible to obtain quantitative information on the energy landscape for glass-forming liquids. Focus was on the idea of suddenly extracting the thermal energy, so that the system obtained for subsequent study has the structure, and hence potential energy, of a liquid at a much higher temperature than the normal glass temperature. Results show that, when the temperature is raised at constant pressure, the total density of states changes in a manner that can be well represented by a two-Gaussian excitation across the centroid, leaving a third and major Gaussian component unchanging. The low frequency Gaussian component has a constant peak frequency of 18 cm-1 and is identified with the Boson peak.
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U2 - 10.1088/0953-8984/15/11/327
DO - 10.1088/0953-8984/15/11/327
M3 - Article
AN - SCOPUS:0037467275
VL - 15
SP - S1051-S1068
JO - Journal of Physics Condensed Matter
JF - Journal of Physics Condensed Matter
SN - 0953-8984
IS - 11
ER -