报告人： Srdjan Petrović  Principal Research Fellow（University of Belgrade）

报告题目：Rainbow Molière Low Energy Proton-Graphene Interaction Potential

报告时间：2026年7月21日（星期二）09:00

报告地点：理工楼1226

邀请人：黄亮

报告摘要：

Accurate modeling of interatomic potentials is essential for understanding the interaction dynamics of low-energy ions with two-dimensional nanomaterials. While universal formulations like the Ziegler-Biersack-Littmark (ZBL) and standard Molière potentials are widely utilized, they often struggle to maintain high accuracy across both short- and long-range impact parameters simultaneously. In this work, we introduce the Rainbow Molière (RM) screened Coulomb potential, developed as a morphological modification of the classical Molière potential. By exploiting the topological features of the transmission rainbow scattering patterns of protons through a single-layer graphene sheet, we solve the inverse scattering problem. The RM potential is optimized by adjusting its screening parameter such that the predicted outer atomic rainbow (dominating at small impact parameters) closely aligns with the ZBL potential, while the inner primary rainbow (dominating at large impact parameters) matches the standard Molière potential. These results demonstrate that the morphological rainbow method can be successfully extended to 2D materials, offering a framework to extract precise interatomic potentials directly from experimental scattering morphology rather than relying solely on universal or ab initio approximations.

个人简介：

Dr. Srđan Petrović，Principal Research Fellow，Deputy Head of the Laboratory of Physics VINČA Institute of Nuclear Sciences National Institute of the Republic of Serbia, University of Belgrade.

Research Areas & Expertise:

Ion-Solid Interactions: Theoretical and computational modeling of the interaction of energetic ions and positrons with crystalline materials and 2D nanostructures (e.g., graphene, silicon, diamond).

Rainbow Channeling & Superfocusing: Theoretical analysis and simulation of crystal rainbow effects in ion transmission through ultra-thin channels and nanomaterials.

Materials Modification: Analysis and precise engineering of material properties utilizing high-energy ion beams.

Mathematical Physics & Modeling: Nonlinear dynamics, bifurcation theory, and singularity theory applied to atomic and ion-solid scattering systems.