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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…
Slow sound in matter-wave dark soliton gases
Muzzamal I. Shaukat, Eduardo V. Castro, Hugo Terças
We demonstrate the possibility of drastically reducing the velocity of phonons in quasi one-dimensional Bose-Einstein condensates. Our scheme consists of a dilute dark-soliton "gas…
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…
Temperature-driven gapless topological insulator
Miguel Gonçalves, Pedro Ribeiro, Rubem Mondaini +1
We investigate the phase diagram of the Haldane-Falicov-Kimball model -- a model combining topology, interactions and spontaneous disorder at finite temperatures. Using an unbiased…
Robust one-dimensionality at twin-grain-boundaries in MoSe
Tilen Cadez, Linhu Li, Eduardo V. Castro +1
We show that 1D electron states confined at twin-grain-boundaries in MoSe can be modeled by a three-orbital tight binding model including a minimum set of phenomenological ho…
Electronic spectral properties of incommensurate twisted trilayer graphene
B. Amorim, Eduardo V. Castro
Multilayered van der Waals structures often lack periodicity, which difficults their modeling. Building on previous work for bilayers, we develop a tight-binding based, momentum sp…