Scalar-Interchange Potential and Magnetic/Thermodynamic Properties of Graphene-like Materials

TL;DR

This study uses numerical simulations to investigate how a new scalar exchange potential, related to Kekulé deformations, influences the magnetic and thermodynamic properties of graphene-like materials under various conditions.

Contribution

It introduces a novel scalar exchange potential linked to Kekulé deformations and analyzes its impact on physical properties of graphene-like systems through Monte Carlo simulations.

Findings

Kekulé deformation significantly affects magnetic properties.

The new potential alters thermal equilibrium magnetization.

Magnetic susceptibility and specific heat are influenced by the exchange potential.

Abstract

By means of numerical simulations, we explore possible effects of a special interparticle interaction potential which is a function of external and internal conditions of graphene-like systems. In addition to the electromagnetic interaction, we introduce a new potential due to the exchange of a massive scalar, associated to the so-called Kekul\'e deformations; this interaction displays a spin-dependent profile. It turns out that the magnitude of Kekul\'e deformation may significantly affect physical properties of graphene. A Monte Carlo analysis enables one to analyze the behavior of the system under variation of the applied external field, temperature, and the particular type of the exchanged excitation that induces the potential. We pursue an investigation of the spin configurations, we analyze differences in thermal equilibrium magnetization and we carry out calculations of the magnetic susceptibility and the specific heat in the presence of the Kekul\'e-induced new potential.