Quantum moiré material

Twisted graphene bilayers create a larger-scale moiré pattern determined by the relative angle between layers.
The resulting moiré potential acts like an egg-carton landscape, concentrating electrons in lower-energy valleys.
Client
NIST
Year
2023
Type
explanatory diagram
Field
quantum materials / condensed matter physics
Links
NIST story / Science paper
Description
Two public-facing diagrams showing how twisted graphene bilayers create moiré quantum matter and how the resulting potential landscape shapes electron behavior.

Context

The diagrams accompanied a NIST story on a quantum ruler for exploring moiré quantum matter. The research centered on stacked graphene bilayers that become electronically unusual when one bilayer is twisted relative to another.

Approach

The illustrations show an abstract material at two scales: the atomic geometry of twisted graphene bilayers, and the larger moiré potential landscape that emerges from that twist. The first diagram shows the layered structure and angle relationship; the second turns the resulting electronic potential into a shaded surface.