OBSERVATIONS OF PARALLEL FIELD INDUCED REENTRANT QUANTUM HALL EFFECTS IN WIDE GaAs QUANTUM WELLS
20 May 2009
We report the results of tilted magnetic field experiments on three high quality wide GaAs quantum wells, with particular emphasis on the N >= 1 Landau levels. With an increasing component of in-plane magnetic field, B(parallel to), we observe reentrant behavior for the odd filling factor quantum Hall states. This reentrance is not explained within a single-particle energy level crossing scheme and may be related to the collapse of interlayer tunneling.