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arXiv · 1801.06842

Shubnikov-de Haas-like Quantum Oscillations in Artificial One-Dimensional LaAlO3/SrTiO3 Electron Channels

Guanglei Cheng·Anil Annadi·Shicheng Lu·Hyungwoo Lee·Jung-Woo Lee·Mengchen Huang·Chang-Beom Eom·Patrick Irvin·Jeremy Levy
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Abstract

The widely reported magnetoresistance oscillations in LaAlO3/SrTiO3 heterostructures have invariably been attributed to the Shubnikov-de Haas (SdH) effect, despite a pronounced inconsistency with low-field Hall resistance measurements. Here we report SdH-like resistance oscillations in quasi-1D electron waveguides created at the LaAlO3/SrTiO3 interface by conductive atomic force microscopy lithography. These oscillations can be directly attributed to magnetic depopulation of magnetoelectric subbands. Our results suggest that the SdH oscillations in 2D SrTiO3-based systems may originate from naturally forming quasi-1D channels.

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Guanglei Cheng, Anil Annadi, Shicheng Lu, Hyungwoo Lee, Jung-Woo Lee, Mengchen Huang, Chang-Beom Eom, Patrick Irvin, Jeremy Levy. 2018-01-21. Shubnikov-de Haas-like Quantum Oscillations in Artificial One-Dimensional LaAlO3/SrTiO3 Electron Channels. https://doi.org/10.1103/physrevlett.120.076801

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