The diffusion characteristics of charged particles in complex plasmasN. Kh. Bastykova^1,2, T. S. Ramazanov^1,2, S. K. Kodanova^1,21Institute of Applied Sciences and IT, Almaty, Kazakhstan²IETP, Al-Farabi Kazakh National University, Almaty, Kazakhstan

The study of diffusion processes in two-dimensional (2D) Yukawa systems is crucial for understanding the behavior of strongly correlated charged particles in complex plasmas and colloidal suspensions. These systems exhibit unique transport properties due to the interplay between interparticle interactions and external influences such as magnetic fields [1-2]. While extensive research has been conducted on the effect of magnetic fields on diffusion, the role of finite particle size remains insufficiently studied. The presence of a finite particle size introduces additional constraints on particle motion, affecting fundamental transport coefficients. Addressing this gap is essential for both theoretical models and experimental applications in plasma physics and nanotechnology.

In this work, the impact of finite particle size on the diffusion characteristics of a two-dimensional Yukawa systems through MD simulations has been investigated [3-5]. Using molecular dynamics simulations, we investigate the influence of finite particle size on the diffusion characteristics of 2D Yukawa systems under various external conditions, including a magnetic field. Mean squared displacements and diffusion coefficients are calculated for different system parameters. Our results show that finite particle size can either increase or decrease the diffusion coefficient, depending on the level of magnetization. The introduced interaction model incorporates a particle-overlap constraint, allowing for a more accurate description of particle motion. The results are also significant for improving theoretical diffusion models in two-dimensional systems.