Effect of laser field and magnetic flux on scattering in graphene quantum dots

TL;DR

This study explores how circularly polarized light and magnetic flux influence electron scattering in graphene quantum dots, revealing control mechanisms for electron localization and scattering properties.

Contribution

It introduces a comprehensive analysis of electron scattering in GQDs under combined electromagnetic fields, highlighting the role of light polarization and intensity in tuning electronic behavior.

Findings

Light polarization controls electron localization.

Magnetic flux and light intensity affect quasi-bound state formation.

Electrostatic potential modulates scattering state density.

Abstract

We show how Dirac electrons interact with a graphene quantum dots (GQDs) when exposed to both a magnetic flux and circularly polarized light. After obtaining the solutions of the energy spectrum, we compute the scattering coefficients. These allow us to show how efficiently the electrons diffuse and how their probability density is distributed in space. Our results show that light polarization is key in controlling electron scattering. It affects electron localization near the GQDs and the strength of the scattering coefficients. We also investigate how light intensity and magnetic flux affect the formation of quasi-bound states. In addition, the electrostatic potential reduces the density of scattering states and fine-tunes the interaction between electrons and the quantum dot. This research improves our understanding of electron behavior in graphene nanostructures and suggests new ways to control electronic states at the quantum level.