Physics – Computational Physics
Scientific paper
2007-07-17
Physics
Computational Physics
It has 19 pages and 4 figures
Scientific paper
10.1063/1.2804382
We present a fast and accurate method to calculate the electrostatic energy and forces of interacting particles with the boundary conditions appropriate to surfaces, i.e periodic in the two directions parallel to the surface and free in the perpendicular direction. In the spirit of the Ewald method the problem is divided into a short range and long range part. The charge density responsible for the long range part is represented by plane waves in the periodic directions and by finite elements in the non-periodic direction. Our method has computational complexity of O(N_g log(N_g)) with a very small prefactor, where N_g is the number of grid points.
Ghasemi Seyed Alireza
Goedecker Stefan
Neelov Alexey
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