Related Experiment Video
Updated: Aug 11, 2026

Tuning Oxide Properties by Oxygen Vacancy Control During Growth and Annealing
Published on: June 9, 2023
Anisotropic disorder in high-mobility 2D heterostructures and its correlation to electron transport
R L Willett1, J W Hsu, D Natelson
1Bell Laboratories, Lucent Technologies, Murray Hill, NJ 07974, USA.
Abstract:
Surface morphology of high-mobility heterostructures is examined and correlated with dc transport. All samples examined show evidence of lines in the [11-0] direction with roughness ranging from small-amplitude features to severe anisotropic ridges. Transport in these samples is consistent with that in samples having artificially induced 1D charge modulations. The native surface properties reflect a prevalent, anisotropic disorder affecting 2D electron conduction. Importantly, the native lines are orthogonal to the stripes theoretically proposed to explain high Landau level transport anisotropies.
More Related Videos
Related Concept Videos
Trends in Lattice Energy: Ion Size and Charge
Electrostatic Boundary Conditions in Dielectrics
Consider a case where both the mediums across a boundary are two different dielectric materials. Recall that the electric field and electric displacement are proportional and related through the material's permittivity.
Carrier Transport
Drift Current:
The drift of charge carriers is started by an external electric field (E). Charged particles, such as electrons and holes, experience an acceleration between collisions with lattice atoms. For electrons, this results in a drift velocity (vd) given by:
Debye–Huckel–Onsager Conductance Equation
The Electrical Double Layer
Imperfections in Crystal Structure: Stoichiometric Point Defects

