6 citations · 13 across the 9 of their papers we have counts for
9 papers
Superfluidity of dipolar excitons in a double layer of with a mass term
Oleg L. Berman, Godfrey Gumbs, Gabriel P. Martins +1
We predict Bose-Einstein condensation and superfluidity of dipolar excitons, formed by electron-hole pairs in spatially separated gapped hexagonal (GHAT3) layers. In the…
Tunneling conductivity fast modulated by optically-dressed electrons in graphene and a dice lattice
Andrii Iurov, Liubov Zhemchuzhna, Godfrey Gumbs +2
Based on the transmission coefficient of tunneling electrons, we have presented tunneling current and conductivity across a square-potential barrier for both graphene and -$\mat…
Adjustable propagating plasmons in lattice-based armchair nanoribbons
Andrii Iurov, Liubov Zhemchuzhna, Paula Fekete +5
We have obtained and analyzed the electronic states, polarization function and the plasmon excitations for -based nanoribbons with armchair termination. The calcu…
Defect capturing and charging dynamics and their effects on magneto-transport of electrons in quantum wells
Andrii Iurov, Danhong Huang, Godfrey Gumbs +2
The defect corrections to polarization and dielectric functions of Bloch electrons in quantum wells are first calculated. Following this, we derive the first two moment equations f…
Anomalous Klein paradox due to misalignment of optically-tunable elliptical dispersion for Dirac-cone dressed states and direction of incoming particles
Andrii Iurov, Liubov Zhemchuzhna, Paula Fekete +2
After having derived boundary conditions for dressed-state electrons in a dice lattice, we investigate the electron tunneling through a square electrostatic potential barrier in bo…
Environmental Effects on the Terahertz Surface Plasmons in Epitaxial Graphene
Godfrey Gumbs, Andrii Iurov, Jhao-Ying Wu +2
In this paper, we predict the existence of low-frequency nonlocal plasmon excitations at the vacuum-surface interface of a superlattice of graphene layers interacting with a th…
Effects of periodic scattering potential on Landau quantization and ballistic transport of electrons in graphene
Godfrey Gumbs, Andrii Iurov, Danhong Huang +2
A two-dimensional periodic array of scatterers has been introduced to a single layer of graphene in the presence of an external magnetic field perpendicular to the graphene layer.…
Electronic properties of closed cage nanometer-size spherical graphitic particles
Godfrey Gumbs, Antonios Balassis, Andrii Iurov +1
We investigate the localization of charged particles by the image potential of spherical shells, such as fullerene buckyballs. These "spherical image states" exist within surface p…
Spin-dependent Scattering by a Potential Barrier on a Nanotube
Yonatan Abranyos, Godfrey Gumbs, Paula Fekete
The electron spin effects on the surface of a nanotube have been considered through the spin-orbit interaction (SOI), arising from the electron confinement on the surface of the na…