Diffusion on Solid Surface: anomalous is Normal
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...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2004 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/2509 |
| Acceso en línea: | https://hdl.handle.net/2117/2509 https://dx.doi.org/10.1103/PhysRevLett.92.250601 |
| Access Level: | acceso abierto |
| Palabra clave: | Diffusion Surfaces (Physics) Nonlinear systems Nonlinear dynamics Diffusion on surfaces Superdiffusion Random potentials Sistemes no lineals Difusió Superfícies (Física) Àrees temàtiques de la UPC::Física |
| Sumario: | 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. |
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