We study the plateaux of the integer quantum Hall resistance in a bilayer electron system in tilted magnetic fields. In a narrow range of tilt angles and at certain magnetic fields, the plateau level deviates appreciably from the quantized value with no dissipative transport emerging. A qualitative account of the effect is given in terms of decoupling of the edge states corresponding to different electron layers/Landau levels.
@article{arxiv.cond-mat/0112088,
title = {Shifting the quantum Hall plateau level in a double layer electron system},
author = {E. V. Deviatov and A. A. Shashkin and V. T. Dolgopolov and H. -J. Kutschera and A. Wixforth and K. L. Campman and A. C. Gossard},
journal= {arXiv preprint arXiv:cond-mat/0112088},
year = {2009}
}