2000/04/26 by Olivier Bénichou, O. Benichou, A. M. Cazabat +4 · 1 citation
Materials Science · Physics and Astronomy · #Advanced Thermodynamics and Statistical Mechanics #Material Dynamics and Properties #Theoretical and Computational Physics #cond-mat.soft #cond-mat.stat-mech
paper · pdf · doi:10.1103/physrevb.63.235413
Latex, 31 pages, 3 figures
arxiv created 2000/04/26 · openalex publication_date 2001/05/30 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We study the dynamics of a hard-core tracer particle (TP), performing a biased random walk in an adsorbed monolayer composed of mobile hard-core particles undergoing continuous exchanges with a vapor phase. In terms of an approximate approach, based on the decoupling of the third-order correlation functions, we obtain the density profiles of the monolayer particles around the TP, and derive the force-velocity relation, determining the TP terminal velocity Vtr as a function of the magnitude of the external bias and other system parameters. These results generalize, for the case of an arbitrary applied field, our earlier predictions [Phys. Rev. Lett. 84, 511 (2000)] obtained in the limit of a vanishingly small external bias. Asymptotic forms of the monolayer particle density profiles at large separations from the TP, and the behavior of Vtr in the limit of a small external bias, are found explicitly.