58 citations · 193 across the 9 of their papers we have counts for
8 papers
Conditions for the occurrence of Coulomb blockade in phosphorene quantum dots at room temperature
H. A. Melo, M. A. Lino, D. R. da Costa +4
We study the addition energy spectra of phosphorene quantum dots focusing on the role of dot size, edges passivation, number of layers and dielectric constant of the substrate wher…
Electrostatics of electron-hole interactions in van der Waals heterostructures
L. S. R. Cavalcante, A. Chaves, B. Van Duppen +2
The role of dielectric screening of electron-hole interaction in van der Waals heterostructures is theoretically investigated. A comparison between models available in the literatu…
Excitonic gaps and exciton binding energies in multilayer phosphorene quantum dots
M. A. Lino, J. S. de Sousa, D. R. da Costa +3
Dielectric screening is greatly important to an accurate calculation of the exciton binding energies in two-dimensional materials. In this work, we calculate the dielectric functio…
Substrate effects on the exciton fine structure of black phosphorus quantum dots
J. S. de Sousa, M. A. Lino, D. R. da Costa +3
We study the size-dependent exciton fine structure in monolayer black phosphorus quantum dots (BPQDs) deposited on different substrates (isolated, Si and SiO) using a combinati…
Interferometry of Klein tunnelling electrons in graphene quantum rings
D. J. P. de Sousa, Andrey Chaves, J. M. Pereira +1
We theoretically study a current switch that exploits the phase acquired by a charge carrier as it tunnels through a potential barrier in graphene. The system acts as an interferom…
Charging energy spectrum of black phosphorus quantum dots
M. A. Lino, J. S. de Sousa, D. R. da Costa +3
We present a theoretical study of the charging effects in single and double layer black phosphorus quantum dots (BPQDs) with lateral sizes of 2 nm and 3 nm. We demonstrate that the…
All-strain based valley filter in graphene nanoribbons using snake states
L. S. Cavalcante, A. Chaves, D. R. da Costa +2
A pseudo-magnetic field kink can be realized along a graphene nanoribbon using strain engineering. Electron transport along this kink is governed by snake states that are character…
Valley filtering using electrostatic potentials in bilayer graphene
D. R. da Costa, A. Chaves, S. H. R. Sena +2
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 th…