187 citations
- Hunter CollegeUS50 papers
- U.S. Air Force Research Laboratory Space Vehicles Directorate47 papers
- City University of New YorkUS46 papers
- United States Air Force Research LaboratoryUS36 papers
- Donostia International Physics CenterES27 papers
- University of New MexicoUS24 papers
- Medgar Evers CollegeUS9 papers
- University of ArizonaUS9 papers
- Goddard Space Flight CenterUS8 papers
- University of MichiganUS7 papers
- Centre National de la Recherche ScientifiqueFR6 papers
- National Cheng Kung UniversityTW6 papers
10 papers · 1 filter
Dynamical optical conductivity for gapped materials with a curved "flat" band
Andrii Iurov, Liubov Zhemchuzhna, Godfrey Gumbs +1
We have calculated the dynamical optical conductivity for materials in the presence of a finite bandgap in their energy bandstructure. This is a special type of e…
Finite-temperature plasmons, damping and collective behavior for model
Andrii Iurov, Liubov Zhemchuzhna, Godfrey Gumbs +3
We have conducted a thorough theoretical and numerical investigation of the electronic susceptibility, polarizability, plasmons, their damping rates, as well as the static screenin…
Diverse Magnetic Quantization in Bilayer Silicene
Thi-Nga Do, Po-Hsin Shih, Godfrey Gumbs +3
The generalized tight-binding model is developed to investigate the rich and unique electronic properties of AB-bt (bottom-top) bilayer silicene under uniform perpendicular electri…
Effects of nonlocal plasmons in gapped graphene micro-ribbon array and 2DEG on near-field electromagnetic response in the deep-subwavelength regime
Danhong Huang, Godfrey Gumbs, Oleksiy Roslyak
A self-consistent theory involving Maxwell equations and a density-matrix linear-response theory is solved for an electromagnetically-coupled doped graphene micro-ribbon array and…
Plasmons in single- and double-component helical liquids: Application to two-dimensional topological insulators
O. Roslyak, Godfrey Gumbs, D. H. Huang
The plasmon excitations in proposed single- and double-component helical liquid (HL) models are investigated within the random-phase approximation, by calculating the density-densi…
Anomalous Photon-Assisted Tunneling in Graphene
Andrii Iurov, Godfrey Gumbs, Oleksiy Roslyak +1
We investigated the Dirac electrons transmission through a potential barrier in the presence of circularly polarized light. An anomalous photon-assisted enhanced transmission is pr…