Zener Tunneling Between Landau Orbits in a High-Mobility Two-Dimensional Electron Gas
C. L. Yang, J. Zhang, R. R. Du, J. A. Simmons, J. L. Reno
Abstract
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.
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