Diffusion in a two-dimensional periodic potential
- 1 February 1985
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 31 (2) , 892-896
- https://doi.org/10.1103/physreva.31.892
Abstract
We report a numerical study of the self-diffusion of a single-point particle in a two-dimensional periodic potential of triangular symmetry. The self-diffusion coefficient is obtained via computer simulations for several values of the particle energy. We find that the self-diffusion process is complicated due to the existence of correlated motions involving two or more cells. A random-walk model which takes into account the effects of correlated motions involving only the nearest-neighbor cells is constructed, and compared with the experimental results.Keywords
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