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Titel:

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

Dokumenttyp:
journal article
Autor(en):
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...     »
Zeitschriftentitel:
Physica B
Jahr:
2000
Band / Volume:
284
Seitenangaben Beitrag:
1147-1148
Sprache:
eng
Print-ISSN:
0921-4526
TUM Einrichtung:
Institut für Radiologie
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