Heterostructure bilayer graphene-hBN: Interplay between misalignment, interlayer asymmetry, and trigonal warping

TL;DR

This paper investigates how moiré patterns, interlayer asymmetry, and trigonal warping influence the electronic minibands in bilayer graphene on hBN, revealing complex interplays affecting electronic properties.

Contribution

It provides a comparative analysis of moiré miniband features in bilayer graphene-hBN heterostructures, highlighting the effects of asymmetry and trigonal warping.

Findings

Moiré minibands are significantly affected by interlayer asymmetry.

Trigonal warping influences miniband structure in bilayer graphene.

Comparison with monolayer graphene reveals unique miniband features.

Abstract

We study the superlattice minibands produced by the interplay between moir\'e pattern induced by hexagonal BN substrate on graphene layer and the interlayer coupling in bilayer graphene with Bernal stacking (BLG). We compare moir\'e miniband features in BLG, where they are affected by the interlayer asymmetry of BLG-hBN heterostructure and trigonal warping characteristic for electrons in Bernal-stacked bilayers with those found in monolayer graphene.