Fabry-Pérot resonances in a graphene/hBN Moiré superlattice
arXiv:1701.09141 · doi:10.1021/acs.nanolett.6b04137
Abstract
While Fabry-Pérot resonances and Moiré 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 Moiré 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 Moiré 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.
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- Andreev Reflection and Klein Tunneling in High-Temperature Superconductor/Graphene Junctions
- Dirac fermion optics and directed emission from single- and bilayer graphene cavities
- Quantum Hall interferometry in triangular domains of marginally twisted bilayer graphene
- Controllable Andreev Bound States in Bilayer Graphene Josephson Junction from Short to Long Junction Limits
- Characterization of a graphene-hBN superlattice field effect transistor
- Klein tunneling degradation and enhanced Fabry-Pérot interference in graphene/h-BN moiré-superlattice devices
- Intermediate diffusive-ballistic electron conduction around mesoscopic defects in graphene
- Fabry-Perot and Aharonov-Bohm interference in ideal graphene nanoribbons
- Electronic analogue of Fourier optics with mass-less Dirac fermions scattered by quantum dot lattice
- Mode-selective cloaking and phase-matching cavity resonances in bilayer graphene transport
- Coupling of Klein-Andreev Resonant States in BiSrCaCuO-graphene-BiSrCaCuO Devices