The electronic properties of graphene, a two-dimensional crystal of carbon atoms, are
exceptionally novel. For instance, the low-energy quasiparticles in graphene behave as …

We numerically investigate quantum rings in graphene and find that their electronic
properties may be strongly influenced by the geometry, the edge symmetries, and the …

The electron transmission between monolayer and bilayer graphene is theoretically studied
for zigzag and armchair boundaries within an effective-mass scheme. Due to the presence …

The symmetry of graphene's two carbon sublattices underlies its unique electronic structure
and half-integer quantum Hall effect. Quantized Hall resistance requires confinement of …

The valley Hall conductivity, having opposite signs between the K and K′ valleys, is
calculated in disordered monolayer graphene with gap. In ideal graphene without disorder …

Particle localization is an essential ingredient in quantum Hall physics. In conventional high-
mobility two-dimensional electron systems such as in GaAs/AlGaAs semiconductor …

We describe the effects of vacancies on the electronic properties of a graphene sheet in the
presence of a perpendicular magnetic field: from a single defect to an organized vacancy …

Armchair graphene nanoribbons, when forming a superlattice, can be classified into different
topological phases, with or without edge states. By means of tight-binding and classical …

In this Letter, we calculate the density of states of graphene under a highly uniform magnetic
field and white-noise random potential. We discover that the disorder-broadened zero …

The valley Hall conductivity, having opposite signs between the K and K′ valleys, is
calculated in disordered bilayer graphene in the presence of gate electric field. Numerical …