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Quantum transport in oxide nanostructures

By Cheng Cen, Daniela F. Bogorin, Vanita Srinivasa and Jeremy Levy

Abstract

We describe magnetotransport experiments performed on Hall crosses made from quantum wires at LaAlO3/SrTiO3 interfaces. Shubnikov-de Haas oscillations measured in a 14-nm wide structure exhibit modulations that are consistent with spin-orbit coupling or valley degeneracies. Hall measurements performed on the 6 nm-wide Hall cross reveal dissipative coupling to magnetic phases. Hall plateaus are observed that deviate significantly from two-dimensional quantum Hall counterparts. Non-monotonic dips in the Hall resistance are attributed to one-dimensional confinement and spin-orbit coupling

Topics: Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Materials Science
Year: 2011
OAI identifier: oai:arXiv.org:1103.3036
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