Electronic structure of multilayer graphene

TL;DR

This paper investigates the electronic properties of multilayer graphene with various stacking configurations using a continuum model and perturbation theory, revealing the presence of chiral pseudospin doublets with conserved chirality.

Contribution

It introduces a theoretical framework for understanding the low-energy electronic structure of multilayer graphene with arbitrary stacking, highlighting the role of chiral pseudospin doublets.

Findings

Low-energy electronic structure comprises chiral pseudospin doublets.

Chirality sum is conserved across different stacking configurations.

The model provides insights into electronic behavior in multilayer graphene.

Abstract

We study the electronic structure of multilayer graphene using a $\pi$-orbital continuum model with nearest-neighbor intralayer and interlayer tunneling. Using degenerate state perturbation theory, we show that the low-energy electronic structure of arbitrarily stacked graphene multilayers consists of chiral pseudospin doublets with a conserved chirality sum.