Strongly Anisotropic Transport in Higher Two-Dimensional Landau Levels

Details Strongly Anisotropic Transport in Higher Two-Dimensional Landau Levels Strongly Anisotropic Transport in Higher Two-Dimensional Landau Levels

1998-12-02

arxiv.org/abs/cond-mat/9812025v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

12 pages, 3 Postscript figures

Scientific paper

10.1016/S0038-1098(98)00578-X

Low-temperature, electronic transport in Landau levels N>1 of a two-dimensional electron system is strongly anisotropic. At half-filling of either spin level of each such Landau level the magnetoresistance either collapses to form a deep minimum or is peaked in a sharp maximum, depending on the in-plane current direction. Such anisotropies are absent in the N=0 and N=1 Landau level, which are dominated by the states of the fractional quantum Hall effect. The transport anisotropies may be indicative of a new many particle state, which forms exclusively in higher Landau levels.

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