Dispersive lineshape of the resistively‐detected NMR in the vicinity of Landau level filling ν = 1

Abstract

We report resistively-detected nuclear magnetic resonance studies on GaAs/AlGaAs two-dimensional electron systems in the quantum Hall regime. A peculiar ‘dispersive’ lineshape that occurs in the vicinity of Landau level filling ν = 1 is found to evolve into a simple dip structure with increasing |ν – 1|. The nuclear spin-lattice relaxation rate exhibits distinct temperature dependences in the respective regions. (© 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)