Observation of narrow-band noise accompanying the breakdown of insulating states in high Landau levels
arXiv:cond-mat/0210069 · doi:10.1103/PhysRevLett.90.226803
Abstract
Recent magnetotransport experiments on high mobility two-dimensional electron systems have revealed many-body electron states unique to high Landau levels. Among these are re-entrant integer quantum Hall states which undergo sharp transitions to conduction above some threshold field. Here we report that these transitions are often accompanied by narrow- and broad-band noise with frequencies which are strongly dependent on the magnitude of the applied dc current.
4 pages, 3 figures