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

Abstract

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.

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

References in corpus (3)

• The Onset of Anisotropic Transport of Two-Dimensional Electrons in High Landau Levels: An Isotropic-to-Nematic Liquid Crystal Phase Transition?
• Modeling Subsurface Charge Accumulation Images of a Quantum Hall Liquid
• Tunneling images of a 2D electron system in a quantizing magnetic field

Cited by in corpus (2)

• Impact of the modulation doping layer on the ν=5/2 anisotropy
• Self-consistent equilibrium of a two-dimensional electron system with a reservoir in a quantizing magnetic field: Analytical approach