Geometry and edge effects on the energy levels of graphene quantum rings: A comparison between tight-binding and simplified Dirac models
We present a systematic study of the energy spectra of graphene quantum rings having
different geometries and edge types in the presence of a perpendicular magnetic field …
different geometries and edge types in the presence of a perpendicular magnetic field …
Valley filtering using electrostatic potentials in bilayer graphene
Propagation of an electron wave packet through a quantum point contact (QPC) defined by
electrostatic gates in bilayer graphene is investigated. The gates provide a bias between the …
electrostatic gates in bilayer graphene is investigated. The gates provide a bias between the …
Analytic solution to pseudo-Landau levels in strongly bent graphene nanoribbons
Nonuniform elastic strain is known to induce pseudo-Landau levels in Dirac materials. But
these pseudo-Landau levels are hardly resolvable in an analytic fashion when the strain is …
these pseudo-Landau levels are hardly resolvable in an analytic fashion when the strain is …
Effect of zigzag and armchair edges on the electronic transport in single-layer and bilayer graphene nanoribbons with defects
We study electronic transport in monolayer and bilayer graphene with single and many short-
range defects focusing on the role of edge termination (zigzag versus armchair). Within the …
range defects focusing on the role of edge termination (zigzag versus armchair). Within the …
All-strain based valley filter in graphene nanoribbons using snake states
A pseudomagnetic field kink can be realized along a graphene nanoribbon using strain
engineering. Electron transport along this kink is governed by snake states that are …
engineering. Electron transport along this kink is governed by snake states that are …
Valley Hall effect and nonlocal transport in strained graphene
Graphene subject to high levels of shear strain leads to strong pseudo-magnetic fields
resulting in the emergence of pseudo-Landau levels. Here we show that, with modest levels …
resulting in the emergence of pseudo-Landau levels. Here we show that, with modest levels …
Modulation of persistent current in graphene quantum rings
We investigate the effect of long-range impurity potentials on the persistent current of
graphene quantum rings in the presence of an uniform perpendicular magnetic field. The …
graphene quantum rings in the presence of an uniform perpendicular magnetic field. The …
Frequency-tunable terahertz graphene laser enabled by pseudomagnetic fields in strain-engineered graphene
Graphene-based optoelectronic devices have recently attracted much attention for the next-
generation electronic-photonic integrated circuits. However, it remains elusive whether it is …
generation electronic-photonic integrated circuits. However, it remains elusive whether it is …
Dirac fermions in graphene using the position-dependent translation operator formalism
Within the position-dependent translation operator formalism for quantum systems, we
obtain analytical expressions for the eigenstates and the Landau level spectrum of Dirac …
obtain analytical expressions for the eigenstates and the Landau level spectrum of Dirac …
Gate potential-controlled current switching in graphene Y-junctions
In this work we investigate the ballistic transport of electrons through three-terminal
graphene-based devices. The system consists of a Y-shaped junction formed by three …
graphene-based devices. The system consists of a Y-shaped junction formed by three …