4 papers
Effect of magnetic field and chemical potential on the RKKY interaction in the - lattice
Oleksiy Roslyak, Godfrey Gumbs, Antonios Balassis +1
The interaction energy for the indirect-exchange or Ruderman-Kittel-Kasuva-Yosida (RKKY) interaction between magnetic spins localized on lattice sites of the - model…
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.…
Combined effect of doping and temperature on the anisotropy of low-energy plasmons in monolayer graphene
Godfrey Gumbs, Antonios Balassis, V. M. Silkin
We compare the two-dimensional (2D) plasmon dispersion relations for monolayer graphene when the sample is doped with carriers in the conduction band and the temperature is zer…
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…