First-principles quantum molecular-dynamics study of the vibrations of icosahedral
- 15 August 1991
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 44 (8), 4052-4055
- https://doi.org/10.1103/physrevb.44.4052
Abstract
Using first-principles real-space quantum-molecular-dynamics, we compute the structure and normal modes of icosahedral . The many-electron ground-state energy and atomic forces are computed for each atomic configuration, and the results are used in molecular-dynamics calculations of the modes. We focus here on the 14 modes which are either first-order Raman active or infrared active, and we compare our calculated mode frequencies with experimental data. Using no free parameters, we compute the frequencies to between 4% and 16% of their measured values, depending on the mode.
Keywords
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