Magnetotransport in a laterally confined two-dimensional electron gas (2DEG) can exhibit modified scattering channels owing to a tilted Hall potential. Transitions of electrons between Landau levels with shifted guiding centers can be accomplished through a Zener tunneling mechanism, and make a significant contribution to the magnetoresistance. A remarkable oscillation effect in weak field magnetoresistance has been observed in high-mobility 2DEGs in GaAs-AlGa0.3As0.7 heterostructures, and can be well explained by the Zener mechanism.
@article{arxiv.cond-mat/0204488,
title = {Zener Tunneling Between Landau Orbits in a High-Mobility Two-Dimensional Electron Gas},
author = {C. L. Yang and J. Zhang and R. R. Du and J. A. Simmons and J. L. Reno},
journal= {arXiv preprint arXiv:cond-mat/0204488},
year = {2009}
}
Comments
5 pages, 4 figures. Text slightly shortened, figures resized