68 citations · 94 across the 6 of their papers we have counts for
6 papers
Optical Gain Through Metallic Electro-Optical Effects
N. Roldan-Levchenko, D. J. P. de Sousa, C. O. Ascencio +3
Optical gain is a critical process in today's semiconductor technology and it is most often achieved via stimulated emission. In this theoretical study, we find a resonant TE mode…
Linear Magnetoelectric Electro-Optic Effect
D. J. P. de Sousa, C. O. Ascencio, Tony Low
In this work, we derive a generalized constitutive relation describing the current response to external electromagnetic fields in electrically biased quantum materials. While our s…
Gigantic tunneling magnetoresistance in magnetic Weyl semimetal tunnel junctions
D. J. P. de Sousa, C. O. Ascencio, P. M. Haney +2
We investigate the tunneling magnetoresistance in magnetic tunnel junctions (MTJs) comprised of Weyl semimetal contacts. We show that chirality-magnetization locking leads to a gig…
Plasmons in bias-induced topological phase transition in black phosphorus
D. J. P. de Sousa, L. S. R. Cavalcante, Andrey Chaves +2
We investigate the plasmons in bilayer black phosphorus (BP) with bias-driven formation of Dirac cones, by developing an effective two-band Hamiltonian that captures this electroni…
Multilayers black phosphorus: from tight-binding to continuum description
D. J. P. de Souza, L. V. de Castro, D. R. da Costa +2
We investigate the electronic properties of -layer black phosphorus by means of an analytical method based on a recently proposed tight-binding Hamiltonian involving hoppin…
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…