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Incommensurability-induced sub-ballistic narrow-band-states in twisted bilayer graphene
Miguel Gonçalves, Hadi Z. Olyaei, Bruno Amorim +3
We study the localization properties of electrons in incommensurate twisted bilayer graphene for small angles, encompassing the narrow-band regime, by numerically exact means. Sub-…
Ballistic charge transport in twisted bilayer graphene
Hadi Z. Olyaei, Bruno Amorim, Pedro Ribeiro +1
We study conductance across a twisted bilayer graphene coupled to single-layer graphene leads in two setups: a flake of graphene on top of an infinite graphene ribbon and two overl…
Twisted bilayer graphene: low-energy physics, electronic and optical properties
G. Catarina, B. Amorim, Eduardo V. Castro +2
Van der Waals (vdW) heterostructures ---formed by stacking or growing two-dimensional (2D) crystals on top of each other--- have emerged as a new promising route to tailor and engi…
Dilute magnetism in graphene
Frederico J. Sousa, B. Amorim, Eduardo V. Castro
The phase diagram of graphene decorated with magnetic adatoms distributed either on a single sublattice, or evenly over the two sublattices, is computed for adatom concentrations a…
Transmission across a bilayer graphene region
Hadi Z. Olyaei, Pedro Ribeiro, Eduardo V. Castro
The transmission across a graphene bilayer region is calculated for two different types of connections to monolayer leads. A transfer matrix algorithm based on a tight binding mode…
Dirac points merging and wandering in a model Chern insulator
Miguel Gonçalves, Pedro Ribeiro, Eduardo V. Castro
We present a model for a Chern insulator on the square lattice with complex first and second neighbor hoppings and a sublattice potential which displays an unexpectedly rich physic…