Coulomb drag between graphene and LaAlO3/SrTiO3 heterostructures

ORAL

Abstract

Vertical stacking of heterostructures that combine layered materials offer new ways of combining interesting properties of dissimilar electronic materials. Over the past few years we have been integrating graphene with complex-oxide heterostructures, specifically, the LaAlO3/SrTiO3 system. Furthermore, conducting nanostructures can be written under graphene, producing interesting interactions between the two systems. Here we report Coulomb drag measurements between single-layer graphene and a conductive LaAlO3/SrTiO3 interface. The observed Coulomb drag resistance is non-monotonic and increases for temperatures below 20 K. The temperature dependence is also non-monotonic, showing a notable departure from quadratic scaling, as expected from Fermi-liquid theory . Coulomb drag experiments between the graphene and LaAlO3/SrTiO3 layers show strong coupling in both the normal and superconducting state of the LaAlO3/SrTiO3.

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Presenters

  • Qing Guo

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

Authors

  • Qing Guo

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

  • Jianan Li

    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

  • Jen-Feng Hsu

    University of Pittsburgh, Department of Physics and Astronomy, 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

  • 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

  • Brian R D'Urso

    Department of Physics, University of Montana, Montana State University

  • 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