The magneto resistance of a narrow single quantum well is spectacularly different from the usual behavior. At filling factors 2/3 and 3/5 we observe large and sharp maxima in the longitudinal resistance instead of the expected minima. The peak value of the resistance exceeds those of the surrounding magnetic field regions by a factor of up to three. The formation of the maxima takes place on very large time scales which suggests a close relation with nuclear spins. We discuss the properties of the observed maxima due to a formation of domains of different electronic states.
@article{arxiv.cond-mat/9804283,
title = {Huge Longitudinal Resistance in the Fractional Quantum Hall Effect Regime},
author = {S. Kronmueller and W. Dietsche and J. Weis and K. v. Klitzing and W. Wegscheider and M. Bichler},
journal= {arXiv preprint arXiv:cond-mat/9804283},
year = {2007}
}