Transmission through a biased graphene bilayer barrier

TL;DR

This paper investigates how an applied bias affects electron transmission through a graphene bilayer, revealing that bias-induced gaps significantly alter conductance, with implications for electronic device control.

Contribution

It provides a detailed analysis of bias-controlled transmission in graphene bilayers with various interface geometries, highlighting the tunability of electronic properties.

Findings

Bias opens a sizable gap in the bilayer spectrum.

Transmission probability is highly sensitive to applied bias.

Electronic conductance can be effectively controlled by bias.

Abstract

We study the electronic transmission through a graphene bilayer in the presence of an applied bias between layers. We consider different geometries involving interfaces between both a monolayer and a bilayer and between two bilayers. The applied bias opens a sizable gap in the spectrum inside the bilayer barrier region, thus leading to large changes in the transmission probability and electronic conductance that are controlled by the applied bias.