1 research outputs found
Quantum Hall Effect and Quantum Point Contact in Bilayer-Patched Epitaxial Graphene
We study an epitaxial graphene monolayer
with bilayer inclusions
via magnetotransport measurements and scanning gate microscopy at
low temperatures. We find that bilayer inclusions can be metallic
or insulating depending on the initial and gated carrier density.
The metallic bilayers act as equipotential shorts for edge currents,
while closely spaced insulating bilayers guide the flow of electrons
in the monolayer constriction, which was locally gated using a scanning
gate probe