Electronic Bloch oscillation in a pristine monolayer graphene

Electrochemical properties of CVD grown pristine graphene: monolayer- vs. quasi-graphene.

We report the electrochemical properties of pristine monolayer, double layer and few-layer (termed quasi-) graphene grown via CVD and transferred using PMMA onto an insulating substrate (silicon dioxide wafers). Characterisation has been performed by Raman spectroscopy, optical spectroscopy, Atomic Force Microscopy and X-ray Photoelectron Spectroscopy, revealing 'true' pristine single-layer gra...

Electronic properties of a pristine and NH3/NO2 adsorbed buckled arsenene monolayer

Analogous to exfoliated 2D sheets of black phosphorene, arsenene is an atomically thin layer of the arsenic crystal. In this paper, we investigate the sensitivity of a pristine arsenene sheet for NH3 and NO2molecules in terms of binding energy, nature of bonding, density of states and current–voltage characteristics. The calculated results based on density functional theory find that both NH3 a...

The pristine atomic structure of MoS2 monolayer protected from electron radiation damage by graphene

Electronic and optical properties of monolayer and bilayer graphene.

The electronic and optical properties of monolayer and bilayer graphene are investigated to verify the effects of interlayer interactions and external magnetic field. Monolayer graphene exhibits linear bands in the low-energy region. Then the interlayer interactions in bilayers change these bands into two pairs of parabolic bands, where the lower pair is slightly overlapped and the occupied sta...

Topological Bloch bands in graphene superlattices.

We outline a designer approach to endow widely available plain materials with topological properties by stacking them atop other nontopological materials. The approach is illustrated with a model system comprising graphene stacked atop hexagonal boron nitride. In this case, the Berry curvature of the electron Bloch bands is highly sensitive to the stacking configuration. As a result, electron t...