Negative hopping magnetoresistance of two-dimensional electron gas in a smooth random potential.

  title={Negative hopping magnetoresistance of two-dimensional electron gas in a smooth random potential.},
  author={Raikh and Glazman},
  journal={Physical review letters},
  volume={75 1},
  • Raikh, Glazman
  • Published 4 May 1995
  • Physics, Medicine
  • Physical review letters
We show that the tunnel coupling between semiclassical states localized in different minima of a smooth random potential increases when magnetic field is applied. This increase originates from the difference in gauge factors which electron wave functions belonging to different electron “lakes” acquire in the presence of the field. In the common case of a narrow barrier between two lakes, the characteristic magnetic field is determined by the area of the lakes, and thus may be quite small. The… 
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FIGURES FIG. 1. Two electronic lakes separated by a saddle point (a), and the schematic potential profile in the crossection y=0 (b)
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