Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7934369 | Physica E: Low-dimensional Systems and Nanostructures | 2015 | 19 Pages |
Abstract
We present a perturbative approach to the conductance change caused by a weakly invasive scattering potential in a two-dimensional electron gas. The resulting expressions are used to investigate the relationship between the conductance change measured in scanning gate microscopy as a function of the position of a scattering tip and local electronic quantities like the current density. We use a semiclassical approach to treat the case of a strong hard-wall scatterer in a half-plane facing a reflectionless channel. The resulting conductance change is consistent with the numerically calculated quantum conductance.
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Rodolfo A. Jalabert, Dietmar Weinmann,