Phys. Rev. Lett. 92, 250601 (2004) [4 pages]Diffusion on a Solid Surface: Anomalous is NormalReceived 22 October 2003; published 23 June 2004 We present a numerical study of classical particles diffusing on a solid surface. The particles’ motion is modeled by an underdamped Langevin equation with ordinary thermal noise. The particle-surface interaction is described by a periodic or a random two-dimensional potential. The model leads to a rich variety of different transport regimes, some of which correspond to anomalous diffusion such as has recently been observed in experiments and Monte Carlo simulations. We show that this anomalous behavior is controlled by the friction coefficient and stress that it emerges naturally in a system described by ordinary canonical Maxwell-Boltzmann statistics. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.92.250601
DOI:
10.1103/PhysRevLett.92.250601
PACS:
05.40.–a, 68.35.Fx, 68.43.Jk
See AlsoReply: Jing-Dong Bao and Yan Zhou, Comment on “Diffusion on a Solid Surface: Anomalous is Normal”, Phys. Rev. Lett. 94, 188901 (2005). Reply: J. M. Sancho, A. M. Lacasta, Katja Lindenberg, I. M. Sokolov, and A. H. Romero, Sancho et al. Reply:, Phys. Rev. Lett. 94, 188902 (2005). |
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