Energy loss of charged particles in anisotropic 2D materials using the oscillator model

Silvina Segui; Juana L Gervasoni; Néstor R Arista; Zoran L Mišković

doi:10.1016/j.micron.2023.103521

Energy loss of charged particles in anisotropic 2D materials using the oscillator model

Micron. 2023 Nov:174:103521. doi: 10.1016/j.micron.2023.103521. Epub 2023 Aug 12.

Authors

Silvina Segui¹, Juana L Gervasoni², Néstor R Arista², Zoran L Mišković³

Affiliations

¹ Instituto de Física Enrique Gaviola (IFEG-CONICET), Facultad de Matemática, Astronomía, Física y Computación (FAMAF), Universidad Nacional de Córdoba, 5000 Córdoba, Argentina. Electronic address: silvina.segui@mi.unc.edu.ar.
² Centro Atómico Bariloche, Comisión Nacional de Energía Atómica, and Instituto Balseiro, Universidad Nacional de Cuyo, Av. Bustillo 9500, 8400 S.C. de Bariloche, Argentina.
³ Department of Applied Mathematics and Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario, N2L 3G1 Canada.

PMID: 37657167
DOI: 10.1016/j.micron.2023.103521

Abstract

We apply the oscillator model to study the energy loss processes of external charged particles interacting with a 2D material characterized by an anisotropic conductivity tensor. We model the material as a monolayer of harmonic oscillators, with anisotropic electronic vibration modes. We focus on the cases of parallel and perpendicular trajectories of the external particle, and we obtain analytical expressions for the stopping power and total energy loss in terms of reduced variables. This allows us to analyze in detail the interaction and to adapt the model to the considered material using adequate values for the physical parameters involved.

Keywords: 2D anisotropic materials; Energy loss; Oscillators.