Long-Range Frictional Drag in Coupled LaAlO3/SrTiO3 Nanowires

ORAL

Abstract

Frictional drag, where current in one nanowire induces a voltage across a nearby nanowire, is a powerful tool to study electron interactions. Here we investigate long-range electron interactions in coupled nanowires at the LaAlO3/SrTiO3 interface via frictional drag. In the normal state (B > 0.3T) regime, the antisymmetric drag resistance of double-wire devices is independent of their separation, ruling out the Coulomb interaction as the dominant coupling mechanism. In triple-wire devices this separation independence is corroborated. In the superconducting (B < 0.3T, T < 300mK) regime, a symmetric component is identified in the drag resistance and its separation independence also shows the coupling is predominantly non-Coulombic. These results provide strong evidence for a new long-range non-Coulombic electron interaction that must be accounted for in description of electron transport at oxide interfaces.

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Presenters

  • Yuhe Tang

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

Authors

  • Yuhe Tang

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

  • Anthony Tylan-Tyler

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

  • Hyungwoo Lee

    Department of Materials Science and Engineering, University of Wisconsin–Madison, Department of Materials Science and Engineering, University of Wisconsin-Madison, University of Wisconsin-Madison, Department of Material Science and Engineering, University of Wisconsin-Madison, Materials Science and Engineering, University of Wisconsin-Madison, Materials Science and Engineering, Univ of Wisconsin-Madison, University of Wisconsin–Madison

  • Jung-Woo Lee

    Department of Materials Science and Engineering, University of Wisconsin-Madison, Materials Science and Engineering, University of Wisconsin-Madison, University of Wisconsin–Madison, University of Wisconsin-Madison

  • Michelle Tomczyk

    Pennsylvania State University, Department of Physics and Astronomy, University of Pittsburgh, University of Pittsburgh

  • Mengchen Huang

    Department of Physics and Astronomy, University of Pittsburgh, Physics, University of California-Santa Barbara, Physics and Astronomy, University of Pittsburgh, University of Pittsburgh

  • Chang-Beom Eom

    Department of Materials Science and Engineering, University of Wisconsin–Madison, Department of Materials Science and Engineering, University of Wisconsin-Madison, University of Wisconsin-Madison, Department of Material Science and Engineering, University of Wisconsin-Madison, Materials Science and Engineering, University of Wisconsin-Madison, Materials Science and Engineering, Univ of Wisconsin-Madison, University of Wisconsin–Madison

  • Patrick Irvin

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

  • Jeremy Levy

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