97 citations · 644 across the 52 of their papers we have counts for
45 papers · 1 filter
Energy levels of screened charged impurity in gapped graphene under magnetic field
Andrii Iurov, V. P. Gusynin
In this paper, we present a comprehensive theoretical study of the electronic states in gapped graphene in the presence of a charge impurity and a magnetic field. We focus on the i…
Suppressed plasmon excitations, enhanced damping and static screening in Kek-Y strained model
Jean Marseille, Teresa Lee, Andrii Iurov +3
We performed a rigorous theoretical and numerical investigation into the polarization function, plasmon excitations, and plasmon damping in the Kek- model, a two-dimensional mat…
Exploring non-trivial band structure and spin polarizations in -wave altermagnets tailored by anisotropic optical fields
Andrii Iurov, Liubov Zhemchuzhna, Tiyhearah Danner-Jackson
The subject of the present paper is a detailed theoretical investigation of the energy spectrum and bandgaps, as well as topological and collective properties and linear response,…
Surface effects on the plasmons in two-dimemsional heterostructures: Application to tilted semi-Dirac materials
Teresa Lee, Godfrey Gumbs, Thi Nga Do +2
We derived closed-form analytic expressions for the plasmon dispersion equations for two and three monolayers embedded in a non-uniform dielectric medium with a surface. There is n…
Polarizability and plasmons in pseudospin-1 gapped materials with a flat band
Liubov Zhemchuzhna, Andrii Iurov, Godfrey Gumbs +1
The collective electronic properties of various types of pseudospin- Dirac-cone materials with a flat band and finite bangaps in their energy spectra are the subject of our repo…
Dynamical polarization function, plasmons, their damping and collective effects in semi-Dirac bands
Gabrielle Ross-Harvey, Andrii Iurov, Liubov Zhemchuzhna +2
We have calculated the dynamical polarization, plasmons and damping rates in semi-Dirac bands (SDB's) with zero band gap and half-linear, half-parabolic low-energy spectrum. The ob…
Influence of Dynamical Floquet Spectrum on the Plasmon Excitations and Exchange Energy of tilted monolayer 1TMoS
Sita Kandel, Godfrey Gumbs, Antonios Balassis +2
It is now well established that a high-frequency electromagnetic dressing field within the off-resonance regime significantly modifies the electronic transport and optical properti…
Developing a semiclassical Wentzel-Kramers-Brillouin theory for model
Kathy Blaise, Chinedu Ejiogu, Andrii Iurov +3
We have developed a complete semiclassical Wentzel-Kramers-Brillouin (WKB) theory for model which describes a wide class of existing pseudospin-1 Dirac cone mater…
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…
Rashba spin-orbit coupling and quantum-interference effect for a pair of spin-correlated electrons in their tunneling and reflection under a step potential
Po-Hsin Shih, Godfrey Gumbs, Danhong Huang +2
We present both theory and numerical-computation results for the transmission and reflection probability currents of a charged particle across a potential step in the presence of a…
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…
Coherent-scatterer enhancement and Klein-tunneling suppression by potential barriers in gapped graphene with chirality-time-reversal symmetry
Farhana Anwar, Andrii Iurov, Danhong Huang +2
We have utilized the finite-difference approach to explore electron-tunneling properties in gapped graphene through various electrostatic-potential barriers changing from Gaussian…
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…
Generalized WKB theory for electron tunneling in gapped lattices
Nicholas Weekes, Andrii Iurov, Liubov Zhemchuzhna +2
We generalize Wentzel-Kramers-Brillouin (WKB) semi-classical equations for pseudospin-1 materials with arbitrary hopping parameter , which includes the…
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…
Many-Body Effects and Optical Properties of Single- and Double Layer - Lattices
Andrii Iurov, Godfrey Gumbs, Danhong Huang
An extensive analytical and numerical investigation has been carried out to examine the role played by many-body effects on various - materials under an off-reson…
Nonlinear transport of ballistic Dirac electrons tunneling through a tunable potential barrier in graphene
Farhana Anwar, Andrii Iurov, Danhong Huang +2
Dirac-electronic tunneling and nonlinear transport properties with both finite and zero energy bandgap are investigated for graphene with a tilted potential barrier under a bias. F…
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…
Interplay of Lorentz-Berry forces in position-momentum spaces for valley-dependent impurity scattering in alpha-T3 lattices
Danhong Huang, Andrii Iurov, Hong-Ya Xu +2
The Berry-phase mediated valley-selected skew scattering in alpha-T3 lattices is demonstrated. The interplay of Lorentz and Berry forces in position and momentum spaces is revealed…
Effects of site asymmetry and valley mixing on Hofstadter-type spectra of bilayer graphene in a square-scatter array potential
Danhong Huang, Andrii Iurov, Godfrey Gumbs +1
Under a magnetic field perpendicular to an monolayer graphene, the existence of a two-dimensional periodic scatter array can not only mix Landau levels of the same valley for displ…
Peculiar electronic states, symmetries and Berry phases in irradiated - materials
Andrii Iurov, Godfrey Gumbs, Danhong Huang
We have laid out the results of a rigorous theoretical investigation into the response of electron dressed states, i.e., interacting Floquet states arising from the off-resonant co…
Role of electron back action on photons in hybridizing double-layer graphene plasmons with localized photons
Danhong Huang, Andrii Iurov, Godfrey Gumbs
Induced polarization by Dirac electrons in double-layer graphene can affect hybridization of radiative and evanescent fields. Electron back action appears as a localized optical fi…