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Title:

Model calculations for the vibrational anomalies of a disordered Lennard-Jones solid

Document type:
journal article
Author(s):
Schirmacher, W; Diezemann, G; Ganter, C
Abstract:
Using a modified version of the two-site coherent potential approximation (CPA), also known as effective medium approximation (EMA), we can calculate the density of states (DOS) of a disordered rare-gas-solid modelled by a Lennard-Jones potential. As input we use the radial pair distribution of a pertinent molecular-dynamics simulation of Rahman et al. The resulting DOS agrees well with that of the simulation. The DOS exhibits an anomalous enhanced low-frequency contribution ("boson peak''). We...     »
Journal title abbreviation:
Physica B
Year:
2000
Journal volume:
284
Pages contribution:
1147-1148
Language:
eng
Print-ISSN:
0921-4526
TUM Institution:
Institut für Radiologie
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