# Fabry-P\'erot resonances in a graphene/hBN Moir\'e superlattice

## TL;DR

This paper explores the coexistence of Fabry-Pérot resonances and Moiré superlattices in graphene/hBN heterostructures, revealing how superlattices influence cavity formation and electronic band structure through detailed experimental analysis.

## Contribution

It demonstrates the formation of Fabry-Pérot cavities influenced by Moiré superlattices and analyzes their effects on electronic properties in graphene/hBN devices.

## Key findings

- Fabry-Pérot resonances are affected by the smoothness of the confining potential.
- Moiré superlattices can create satellite Dirac points that form FP cavities.
- Resonance analysis provides insights into band reconstruction due to superlattices.

## Abstract

While Fabry-P\'erot resonances and Moir\'e superlattices are intensively studied in graphene on hexagonal boron nitride (hBN), the two effects have not been discussed in their coexistence. Here we investigate the FP oscillations in a ballistic pnp-junctions in the presence and absence of a Moir\'e superlattice. First, we address the effect of the smoothness of the confining potential on the visibility of the FP resonances and carefully map the evolution of the FP cavity size as a function of densities in and outside the cavity in the absence of a superlattice, when the cavity is bound by regular pn-junctions. Using a sample with a Moir\'e superlattice, we next show that a FP cavity can also be formed by interfaces that mimic a pn-junction, but are defined through a satellite Dirac point due to the superlattice. We carefully analyse the FP resonances, which can provide insight into the band-reconstruction due to the superlattice.