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arXiv · 1310.2153

Single-file and normal diffusion of magnetic colloids in modulated channels

D. Lucena·J. E. Galván-Moya·W. P. Ferreira·F. M. Peeters
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Abstract

Diffusive properties of interacting magnetic dipoles confined in a parabolic narrow channel and in the presence of a periodic modulated (corrugated) potential along the unconfined direction are studied using Brownian dynamics simulations. We compare our simulation results with the analytical result for the effective diffusion coefficient of a single-particle by Festa and d'Agliano [Physica A \textbf{90}, 229 (1978)] and show the importance of inter-particle interaction on the diffusion process. We present results for the diffusion of magnetic dipoles as a function of linear density, strength of the periodic modulation and commensurability factor.

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D. Lucena, J. E. Galván-Moya, W. P. Ferreira, F. M. Peeters. 2013-10-08. Single-file and normal diffusion of magnetic colloids in modulated channels. https://doi.org/10.1103/physreve.89.032306

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