Issue
EPL
Volume 80, Number 5, December 2007
Article Number 56004
Number of page(s) 5
Section Condensed Matter: Structural, Mechanical and Thermal Properties
DOI http://dx.doi.org/10.1209/0295-5075/80/56004
Published online 05 November 2007
EPL, 80 (2007) 56004
DOI: 10.1209/0295-5075/80/56004

Single-file diffusion of interacting particles in a one-dimensional channel

K. Nelissen, V. R. Misko and F. M. Peeters

Departement Fysica, Universiteit Antwerpen - Groenenborgerlaan 171, B-2020 Antwerpen, Belgium


received 7 September 2007; accepted in final form 9 October 2007; published December 2007
published online 5 November 2007

Abstract
Molecular diffusion in unidimensional channel structures (single-file diffusion) is important to understand the behavior of, e.g., colloidal particles in porous materials (zeolites) and superconducting vortices in 1-dimensional (1D) channels. Here the diffusion of charged massive particles in a 1D channel is investigated using the Langevin Dynamics (LD) simulations. We analyze different regimes based on the hierarchy of the interactions and damping mechanisms in the system and we show that, contrary to previous findings, single-file diffusion depends on the inter-particle interaction and could be suppressed if the interaction is strong enough displaying a subdiffusive behavior slower than t1/2, in agreement with recent experimental observations in colloids and charged metallic balls.

PACS
64.60.Cn - Order-disorder transformations; statistical mechanics of model systems.
83.10.Mj - Molecular dynamics, Brownian dynamics.
83.10.Rs - Computer simulation of molecular and particle dynamics.

© Europhysics Letters Association 2007