Ab initio Molecular Dynamics in Adaptive Coordinates

Details Ab initio Molecular Dynamics in Adaptive Coordinates Ab initio Molecular Dynamics in Adaptive Coordinates

1995-03-14

arxiv.org/abs/mtrl-th/9503004v2

Physics

Condensed Matter

Materials Science

11 pages, 3 PostScript figures

Scientific paper

10.1103/PhysRevB.51.11190

We present a new formulation of ab initio molecular dynamics which exploits the efficiency of plane waves in adaptive curvilinear coordinates, and thus provides an accurate treatment of first-row elements. The method is used to perform a molecular dynamics simulation of the CO_2 molecule, and allows to reproduce detailed features of its vibrational spectrum such as the splitting of the Raman sigma+_g mode caused by Fermi resonance. This new approach opens the way to highly accurate ab initio simulations of organic compounds.

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