Zener Tunneling Between Landau Orbits in a High-Mobility Two-Dimensional Electron Gas

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-AlGa${}_{0.3}$As${}_{0.7}$ heterostructures, and can be well explained by the Zener mechanism.

5 pages, 4 figures. Text slightly shortened, figures resized

References in corpus (2)

• Quasiclassical negative magnetoresistance of a 2D electron gas: interplay of strong scatterers and smooth disorder
• A New Class of Magnetoresistance Oscillations: Interaction of a Two-Dimensional Electron Gas with Leaky Interface Phonons

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