DC- and AC-scaling of the integer quantum Hall effect in the presence of interactions
Institut für Physik, Montanuniversität Leoben - 8700 Leoben, Austria
2 I. Institut für Theoretische Physik, Universität Hamburg Jungiusstraße 9, 20355 Hamburg, Germany
Accepted: 5 December 1999
The temperature and frequency dependence of the plateau-to-plateau transitions in the quantum Hall effect are investigated experimentally for up to 5 Landau bands. Features induced by Coulomb interaction and impurity scattering are identified in different regions of temperature, frequency and magnetic field. For DC, data are consistent with scaling exponents , 0.4, depending on whether or not Landau bands with different spin direction are degenerate. For AC (35 to 52 GHz), frequency-dominated behaviour is observed at .
PACS: 73.40.Hm – Quantum Hall effect (integer and fractional) / 71.23.An – Theories and models; localized states / 72.20.My – Galvanomagnetic and other magnetotransport effects
© EDP Sciences, 2000