Spin g-factor due to electronic interactions in graphene

TL;DR

This paper investigates how electronic interactions in graphene modify the electron spin g-factor, providing a theoretical prediction using pseudo-QED and confirming it with experimental data, thus enhancing understanding of magnetic properties in graphene.

Contribution

The study introduces a theoretical model for the g-factor correction in graphene considering full electromagnetic interactions within pseudo-QED, aligning well with experimental results.

Findings

Theoretical prediction matches experimental measurements.

Interaction effects significantly modify the g-factor in graphene.

Good agreement between theory and experiments on SiO2 and SiC substrates.

Abstract

The gyromagnetic factor is an important physical quantity relating the magnetic-dipole moment of a particle to its spin. The electron spin g-factor in vacuo is one of the best model-based theoretical predictions ever made, showing agreement with the measured value up to ten parts per trillion. However, for electrons in a material the g-factor is modified with respect to its value in vacuo because of environment interactions. Here, we show how interaction effects lead to the spin g-factor correction in graphene by considering the full electromagnetic interaction in the framework of pseudo-QED. We compare our theoretical prediction with experiments performed on graphene deposited on SiO2 and SiC, and we find a very good agreement between them.