3 papers
cond-mat1996
Manifestation of the Hofstadter butterfly in far-infrared absorption
Vidar Gudmundsson, Rolf R. Gerhardts
The far-infrared absorption of a two-dimensional electron gas with a square-lattice modulation in a perpendicular constant magnetic field is calculated self-consistently within the…
cond-mat1996
Hofstadter-type energy spectra in lateral superlattices defined by periodic magnetic and electrostatic fields
Rolf R. Gerhardts, Daniela Pfannkuche, Vidar Gudmundsson
We calculate the energy spectrum of an electron moving in a two-dimensional lattice which is defined by an electric potential and an applied perpendicular magnetic field modulated…
cond-mat1995
Effects of screening on the Hofstadter butterfly
Vidar Gudmundsson, Rolf R. Gerhardts
We study, within the Hartree approximation, the effects of the electron-electron interaction on the energy spectrum of a two-dimensional electron gas in a perpendicular homogeneous…