Edge States at the Interface between Monolayer and Bilayer Graphene

TL;DR

This paper investigates the electronic properties of monolayer-bilayer graphene interfaces with zigzag edges, revealing how different stacking types influence edge states and local density of states, which are relevant for transport and STM experiments.

Contribution

It provides a comparative analysis of two zigzag interface types in monolayer-bilayer graphene using Dirac equation and numerical methods, highlighting their distinct electronic behaviors.

Findings

Different edge state behaviors at the two interface types.

Variation in local density of states along the interface.

Insights into transport and STM experimental observations.

Abstract

The electronic property of monolayer-bilayer hybrid graphene with a zigzag interface is studied by both the Dirac equation and numerical calculation. There are two types of zigzag interface stacks. The dispersion and local density of states behave quit differently along the interface at the Fermi energy due to the different locations of the edge state. We hope our study can give some insights in the understanding of the transport and STM experiments.