Long-Range Frictional Drag in Coupled LaAlO<sub>3</sub>/SrTiO<sub>3</sub> 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.
*Work at the University of Pittsburgh was supported by funding from the DOE Office of Basic Energy Sciences under award number DOE DE-SC0014417. Work at the University of Wisconsin was supported by funding from the DOE Office of Basic Energy Sciences under award number DE-FG0206ER46327. Theoretical portion of this work (AT-T) supported in part by ONR N0001415-1-2847.
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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
