5 papers
Nonlinear Thomas-Fermi-Poisson theory of screening for a Hall bar under strong magnetic fields
A. Siddiki, Rolf R. Gerhardts
Low-temperature screening properties of the inhomogeneous two-dimensional electron gas in a Hall bar subjected to a strong perpendicular magnetic field are explored using a self-co…
Positive Magnetoresistance of Composite Fermions in Laterally Modulated Structures
S. D. M. Zwerschke, R. R. Gerhardts
Adopting the mean-field composite fermion picture, we describe the magneto-transport properties of a two-dimensional electron gas with laterally modulated density around filling fa…
Coulomb Effects on the Magnetoconductance of a Two-Dimensional Electron Gas in a Lateral Superlattice: A Screened Hartree-Fock Calculation
Andrei Manolescu, Rolf R. Gerhardts
We calculate the magnetoconductivity tensor of a 2D electron gas in a 1D periodic potential and quantising magnetic fields. We study the internal structure of the Shubnikov-de Haas…
Is the Hofstadter energy spectrum observable in far-infrared absorption?
Vidar Gudmundsson, Rolf R. Gerhardts
The far-infrared absorption of a periodically modulated two-dimensional electron gas in a perpendicular constant magnetic field is calculated self-consistently within the Hartree a…
The Hofstadter Energy Spectrum for an Interacting 2DEG
Vidar Gudmundsson, Rolf R. Gerhardts
We study the effects of the Coulomb interactions between electrons on the Hofstadter butterfly, which characterizes the subband structure of the Landau levels of a two-dimensional…