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

doi:10.1103/PhysRevLett.120.076801

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

Mesoscale and Nanoscale Physics 2018-02-19 v1

Authors: 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.

Keywords

shubnikov-de haas effect laalo3/srtio3 quantum oscillations quasi-1d electron channels magnetoelectric subbands

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@article{arxiv.1801.06842,
  title  = {Shubnikov-de Haas-like Quantum Oscillations in Artificial One-Dimensional LaAlO3/SrTiO3 Electron Channels},
  author = {Guanglei Cheng and Anil Annadi and Shicheng Lu and Hyungwoo Lee and Jung-Woo Lee and Mengchen Huang and Chang-Beom Eom and Patrick Irvin and Jeremy Levy},
  journal= {arXiv preprint arXiv:1801.06842},
  year   = {2018}
}

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16 pages, 4 figures

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

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