Abstract
We have extended the subsurface charge accumulation imaging 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, stripelike structures emerge with a characteristic length scale Present theories do not account for ordered density modulations on this scale.
- Received 29 March 2003
DOI:https://doi.org/10.1103/PhysRevB.68.205328
©2003 American Physical Society