Coulomb drag between graphene and LaAlO<sub>3</sub>/SrTiO<sub>3</sub> 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.

*This research was supported by N00014-16-1-3152 (JL, BD), and N00014-15-1-2847 (JL). The work at University of Wisconsin-Madison was supported by the National Science Foundation under DMREF Grant No. DMR-1629270, AFOSR FA9550-15-1-0334 and AOARD FA2386-15-1-4046.

–

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