Direct observation of micron-scale ordered structure in a two-dimensional electron system

Details Direct observation of micron-scale ordered structure in a two-dimensional electron system Direct observation of micron-scale ordered structure in a two-dimensional electron system

2002-05-09

arxiv.org/abs/cond-mat/0205191v3

Phys. Rev. B 68, 205328 (2003).

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 4 figures. To appear in Phys. Rev. B

Scientific paper

10.1103/PhysRevB.68.205328

We have applied a novel scanned probe method to directly resolve the interior structure of a GaAs/AlGaAs two-dimensional electron system in a tunneling geometry. We find that the application of a perpendicular magnetic field can induce surprising density modulations that are not static as a function of the field. Near six and four filled Landau levels, stripe-like structures emerge with a characteristic wave length ~2 microns. Present theories do not account for ordered density modulations on this length scale.

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