Activation energies and localization in the fractional quantized hall effect.
01 January 1985
Activation energies associated with resistivity anomalies of electrons confined to a two-dimensional potential well in a high magnetic field have recently been reported by Chang et. al. and by Kawaji et. al. The unusual behavior of the activation energy is analyzed in terms of two different excitation mechanisms coexisting in the system in the presence of strong fluctuations in the external donor impurity potential.