Longitudinal magnetoconductivity and magnetodielectric effect in bilayer graphene

TL;DR

This paper investigates how an electron density imbalance in bilayer graphene induces a magnetoelectric effect, affecting its optical and dielectric properties, with implications for understanding magnetoresistance and magnetocapacitance.

Contribution

It demonstrates the impact of valley imbalance-induced magnetoelectric coupling on optical conductivity and dielectric permittivity in bilayer graphene.

Findings

Electron density imbalance induces magnetoelectric coupling.

Magnetoelectric effect influences optical conductivity.

Magnetocapacitance is affected by valley imbalance.

Abstract

It was recently shown that a finite imbalance between electron densities in the $\mathbf{K}$ and $\mathbf{K}'$ valleys of bilayer graphene induces a magnetoelectric coupling. Here we explore ramifications of this electronically tunable magnetoelectric effect for the optical conductivity and dielectric permittivity of this material. Our results augment current understanding of longitudinal magnetoresistance and magnetocapacitance in unconventional materials.