Correlated Insulators in Twisted Bilayer Graphene

TL;DR

This paper investigates the insulating phases in twisted bilayer graphene, analyzing charge distributions and estimating excitation gaps to understand the underlying correlated electronic behavior.

Contribution

It provides theoretical calculations of charge distributions and excitation gaps in twisted bilayer graphene's insulating phases, advancing understanding of correlated insulators.

Findings

Charge distributions in insulating phases characterized.

Estimated excitation gaps consistent with experimental observations.

Insights into the nature of correlated insulators in moiré systems.

Abstract

Experiments on graphene bilayers, where the top layer is rotated with respect to the one below, have displayed insulating behavior when the moir\'e bands are partially filled. We calculate the charge distributions in these phases, and estimate the excitation gaps.