Electronic states bound by repulsive potentials in graphene irradiated by a circularly polarized electromagnetic field

TL;DR

This paper demonstrates that circularly polarized light can induce bound electronic states within repulsive potentials in graphene, revealing novel field-driven quantum phenomena with potential impacts on transport and optical properties.

Contribution

It introduces a Floquet theory-based analysis showing how electromagnetic irradiation creates attractive regions in repulsive potentials in graphene, leading to bound states not present in conventional systems.

Findings

Field-induced bound states in graphene due to irradiation

Differences from traditional parabolic dispersion systems

Potential effects on electronic transport and optical spectra

Abstract

In the framework of the Floquet theory of periodically driven quantum systems, it is demonstrated that irradiation of graphene by a circularly polarized electromagnetic field induces an attractive area in the core of repulsive potentials. Consequently, the quasi-stationary electron states bound by the repulsive potentials appear. The difference between such field-induced states in graphene and usual systems with the parabolic dispersion of electrons is discussed and possible manifestations of these states in electronic transport and optical spectra of graphene are considered.