Angle Dependence of Hall Measurements in LaAlO<sub>3</sub>/SrTiO<sub>3</sub> Nanostructures

ORAL

Abstract

We investigate the Hall response of nanoscale LaAlO3/SrTiO3 Hall crosses [1] as a function of their orientation with respect to the crystallographic direction. Nonlinear Hall effect (NHE) is observed at all angular orientations. Interestingly, the field at which the slope of Hall response changes varies with the orientation of the nanocross with respect to the crystallographic direction, remaining highly reproducible at a given angle. Additionally, the shape of the nonlinear Hall response is observed to diverge from the nominally reported S-shape, at given angular orientations. This characteristic angular dependence of the Hall response shows possible coupling between the NHE and ferroelastic domains at the LaAlO3/SrTiO3 interface.

[1] A. Nethwewala et al., Nanoscale Horizons 4, 1194-1201 (2019)

*JL acknowledges support from NSF PHY-1913034. CBE acknowledges support through the Gordon and Betty Moore Foundation's EPiQS Initiative, Grant GBMF9065.

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Presenters

  • Aditi Nethwewala

    • University of Pittsburgh
    • University of Pittsburgh, Department of Physics and Astronomy, Pittsburgh, PA 15260, USA

Authors

  • Aditi Nethwewala

    • University of Pittsburgh
    • University of Pittsburgh, Department of Physics and Astronomy, Pittsburgh, PA 15260, USA

  • Hyungwoo Lee

    • University of WisconsinMadison, Department of Materials Science and Engineering, Madison, WI 53706, USA
    • University of Wisconsin-Madison, Department of Materials Science and Engineering, Madison, WI 53706, USA

  • Jianan Li

    • University of Pittsburgh, Department of Physics and Astronomy, Pittsburgh, PA 15260, USA

  • Jung-Woo Lee

    • University of Wisconsin-Madison, Department of Materials Science and Engineering, Madison, WI 53706, USA

  • Chang-Beom Eom

    • Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA
    • University of Wisconsin-Madison, Department of Materials Science and Engineering, Madison, WI 53706, USA

  • Patrick Irvin

    • University of Pittsburgh, Department of Physics and Astronomy, Pittsburgh, PA 15260, USA

  • Jeremy Levy

    • University of Pittsburgh
    • University of Pittsburgh, Department of Physics and Astronomy, Pittsburgh, PA 15260, USA