Interplay between Electron Pairing and Nonlinear Hall Effect in LaAlO3/SrTiO3 nanostructures

Aditi Nethwewala; Hyungwoo Lee; Jianan Li; Megan K Briggeman; Yun-Yi Pai; Jungwoo Lee; Chang-Beom Eom; Patrick R Irvin; Jeremy Levy

Interplay between Electron Pairing and Nonlinear Hall Effect in LaAlO3/SrTiO3 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/SrTiO₃interface. 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.

March 15, 2021, 4:00 PM – March 15, 2021, 4:12 PM

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