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

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

2002-04-23

arxiv.org/abs/cond-mat/0204488v2

Phys. Rev. Lett. 89, 076801(2002)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

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

Scientific paper

10.1103/PhysRevLett.89.076801

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.

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