Two-subband quantum Hall effect in parabolic quantum wells
arXiv:cond-mat/0602271 · doi:10.1103/PhysRevB.74.195313
Abstract
The low-temperature magnetoresistance of parabolic quantum wells displays pronounced minima between integer filling factors. Concomitantly the Hall effect exhibits overshoots and plateau-like features next to well-defined ordinary quantum Hall plateaus. These effects set in with the occupation of the second subband. We discuss our observations in the context of single-particle Landau fan charts of a two-subband system empirically extended by a density dependent subband separation and an enhanced spin-splitting g*.
5 pages, submitted