Superlattice of resonators on monolayer graphene created by intercalated gold nanoclusters

Abstract

Here we report on a "new" type of ordering which allows to modify the electronic structure of a graphene monolayer (ML). We have intercalated small gold clusters between the top monolayer graphene and the buffer layer of epitaxial graphene. We show that these clusters perturb the quasiparticles on the ML graphene, and act as quantum dots creating a superlattice of resonators on the graphene ML, as revealed by a strong pattern of standing waves. A detailed analysis of the standing wave patterns using Fourier Transform Scanning Tunneling Spectroscopy strongly indicates that this phenomenon can arise from a strong modification of the band structure of graphene and (or) from Charge Density Waves (CDW)where a large extension of Van Hove singularities are involved.

12 pages, 5 figures

References in corpus (6)

• Ultrathin epitaxial graphite: 2D electron gas properties and a route toward graphene-based nanoelectronics
• Observation of Van Hove singularities in twisted graphene layers
• Topological Surface States Protected From Backscattering by Chiral Spin Texture
• Atomic Hole Doping of Graphene
• Quasiparticle Chirality in Epitaxial Graphene Probed at the Nanometer Scale
• Effect of electron-electron interaction on the Fermi surface topology of doped graphene

Cited by in corpus (7)

• Fourier Transform Scanning Tunneling Spectroscopy: the possibility to obtain constant energy maps and the band dispersion using a local measurement
• Spin-density-wave instability in graphene doped near the van Hove singularity
• Dirac point metamorphosis from third-neighbor couplings in graphene
• High Van Hove singularity extension and Fermi velocity increase in epitaxial graphene functionalized by gold clusters intercalation
• A Hybrid-Monte-Carlo study of monolayer graphene with partially screened Coulomb interactions at finite spin density
• Tunable interface states between Floquet-Weyl semimetals
• The Structure of Graphene on Graphene/C60/Cu Interfaces: A Molecular Dynamics Study