title: Topological oscillations of the magnetoconductance in disordered GaAs layers.
abstract: Oscillatory variations of the diagonal (Gxx) and Hall (G(xy)) magnetoconductances are discussed in view of topological scaling effects giving rise to the quantum Hall effect. They occur in a field range without oscillations of the density of states due to Landau quantization, and are, therefore, totally different from the Shubnikov-de Haas oscillations. Such oscillations are experimentally observed in disordered GaAs layers in the extreme quantum limit of applied magnetic field with a good description by the unified scaling theory of the integer and fractional quantum Hall effect.
authors.affiliation: Institute of Solid State Physics RAS, 142432 Chernogolovka, Moscow District, Russia.
authors.forename: S S
authors.initials: SS
authors.lastname: Murzin
authors.forename: A G M
authors.initials: AG
authors.lastname: Jansen
authors.forename: I
authors.initials: I
authors.lastname: Claus