54 citations · 154 across the 12 of their papers we have counts for
12 papers
Plasmon damping rates in Coulomb-coupled two-dimensional layers in a heterostructure
Dipendra Dahal, Godfrey Gumbs, Andrii Iurov +1
The Coulomb excitations of charge density oscillation are calculated for a double-layer heterostructure. Specifically, we consider two-dimensional (2D) layers of silicene and graph…
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…
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…
Magnetoplasmons for the -T model with filled Landau levels
Antonios Balassis, Dipendra Dahal, Godfrey Gumbs +3
Using the -T model, we carried out analytical and numerical calculations for the static and dynamic polarization functions in the presence of a perpendicular magnetic field.…
Quantum-statistical theory for laser-tuned transport and optical conductivities of dressed electrons in $α-\mc{T}_3$ materials
Andrii Iurov, Liubov Zhemchuzhna, Dipendra Dahal +2
In the presence of external off-resonance and circularly-polarized irradiation, we have derived a many-body formalism and performed a detailed numerical analysis for both the condu…
Polarizability and impurity screening for phosphorene
Po Hsin Shih, Thi Nga Do, Godfrey Gumbs +1
Using a tight-binding Hamiltonian for phosphorene, we have calculated the real part of the polarizability and the corresponding dielectric function, Re, at zero…
Role played by strain on Plasmons, screening and energy loss in Graphene/substrate contacts
Dipendra Dahal, Godfrey Gumbs, Danhong Huang
The combined effect due to mechanical strain, coupling to the plasmons in a doped conducting substrate, the plasmon-phonon scattering in conjunction with the role played by encapsu…
Adatom Doping-Enriched Geometric and Electronic Properties of Pristine Graphene: a Method to Modify the Band Gap
Ngoc Thanh Thuy Tran, Dipendra Dahal, Godfrey Gumbs +1
We have investigated the way in which the concentration and distribution of adatoms affect the geometric and electronic properties of graphene. Our calculations were based on the u…
Effect of Energy Band Gap in Graphene on Negative Refraction through the Veselago Lens and Electron Conductance
Dipendra Dahal, Godfrey Gumbs
A remarkable property of intrinsic graphene is that upon doping, electrons and holes travel through the monolayer thick material with constant velocity which does not depend on ene…
Effect of Temperature and Doping on Plasmon Excitations for an Encapsulated Double-Layer Graphene Heterostructure
Godfrey Gumbs, Dipendra Dahal, Antonios Balassis
We perform a comprehensive analysis of the spectrum of graphene plasmons which arise when a pair of sheets are confined between conducting materials. The associated enhanced local…
Plasmon Excitations for Encapsulated Graphene
Godfrey Gumbs, Norman J. M. Horing, Andrii Iurov +1
We have developed an analytical formulation to calculate the plasmon dispersion relation for a two-dimensional layer which is encapsulated within a narrow spatial gap between two b…
Thermal smearing of the magneto-Kohn anomaly for Dirac materials and comparison with the two-dimensional electron liquid
Godfrey Gumbs, Antonios Balassis, Dipendra Dahal +1
We compute and compare the effects due to a uniform perpendicular magnetic field as well as temperature on the static polarization functions for monolayer graphene (MLG), associate…