Interplay between Electron Pairing and Nonlinear Hall Effect in LaAlO<sub>3</sub>/SrTiO<sub>3</sub> nanostructures

ORAL

Abstract

The widely reported nonlinear Hall effect in LaAlO3/SrTiO3 heterostructures has been attributed to multiband carrier transport in SrTiO3, combined with metamagnetic transitions of unspecified origin. Here, we report simultaneous longitudinal and Hall measurements in quasi-1D cross-shaped electron waveguides (“nanocrosses”) created at the LaAlO3/SrTiO3 interface using conductive atomic force microscope lithography. The nonlinear Hall response is directly correlated with the transition of electrons from the non-superconducting paired state to the unpaired state at the LaAlO3/SrTiO3 interface. These transport measurements strengthen the connection between previously reported metamagnetic effects in gated 2D LaAlO3/SrTiO3 heterostructures and the electron pairing-depairing transition in conductive nanostructures.

*JL acknowledges a Vannevar Bush Faculty Fellowship (ONR N00014-15-1-2847). The work at University of Wisconsin-Madison was supported by the Air Force Office of Scientific Research FA9550-15-1-0334 and the Gordon and Betty Moore Foundation’s EPiQS Initiative, Grant GBMF9065 to Chang-Beom Eom

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Presenters

  • Aditi Nethwewala

    • Physics and Astronomy, University of Pittsburgh
    • Department of Physics and Astronomy, University of Pittsburgh

Authors

  • Aditi Nethwewala

    • Physics and Astronomy, University of Pittsburgh
    • Department of Physics and Astronomy, University of Pittsburgh

  • Hyungwoo Lee

    • Materials Science and Engineering, University of Wisconsin-Madison
    • University of Wisconsin-Madison
    • University of Wisconsin-Maddison
    • Department of Materials Science and Engineering, University of Wisconsin-Madison

  • Jianan Li

    • University of Pittsburgh
    • Department of Physics and Astronomy, University of Pittsburgh

  • Megan K Briggeman

    • University of Pittsburgh
    • Department of Physics and Astronomy, University of Pittsburgh

  • Yun-Yi Pai

    • Materials Science and Technology Division, Oak Ridge National Laboratory
    • Department of Physics and Astronomy, University of Pittsburgh

  • Jungwoo Lee

    • Materials Science and Engineering, University of Wisconsin-Madison
    • University of Wisconsin, Madison
    • Department of Materials Science and Engineering, University of Wisconsin-Madison,, University of Wisconsin
    • University of Wisconsin-Madison
    • University of Wisconsin-Maddison
    • Department of Materials Science and Engineering, University of Wisconsin-Madison

  • Chang-Beom Eom

    • Materials Science and Engineering, University of Wisconsin-Madison
    • University of Wisconsin, Madison
    • Department of Materials Science and Engineering, University of Wisconsin-Maddison
    • Department of Materials Science and Engineering, University of Wisconsin
    • Department of Materials Science Engineering, University of Wisconsin-Madison
    • Department of Materials Science and Engineering, University of Wisconsin-Madison,, University of Wisconsin
    • Material Science and Engineering, University of Wisconsin-Madison
    • University of Wisconsin-Madison
    • University of Wisconsin-Maddison
    • University of Wisconsin - Madison
    • University of Wisconsin Madison
    • Department of Materials Science and Engineering, University of Wisconsin-Madison

  • Patrick R Irvin

    • Physics and Astronomy, University of Pittsburgh
    • University of Pittsburgh
    • Department of Physics and Astronomy, University of Pittsburgh
    • Department of Physics & Astronomy, University of Pittsburgh

  • Jeremy Levy

    • Physics and Astronomy, University of Pittsburgh
    • University of Pittsburgh
    • Department of Physics and Astronomy, University of Pittsburgh
    • Department of Physics & Astronomy, University of Pittsburgh