R51.00011. Coulomb drag between graphene and LaAlO3/SrTiO3 heterostructures

Presented by: Qing Guo


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 LaAlO /SrTiO 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 LaAlO /SrTiO interface. Fabry-Perot oscillations are observed in both graphene and drag signal in graphene, which indicate the local doping in graphene by conductive atomic force microscope(c-AFM) lithography. While the drag resistance is greatly enhanced in SrTiO in the superconducting region, the drag in graphene remain unchanged. We also observed key differences between longitudinal drag and hall drag in both graphene and SrTiO .


  • Qing Guo
  • Jianan Li
  • Jen-Feng Hsu
  • Hyungwoo Lee
  • Chang-Beom Eom
  • Patrick R. Irvin
  • Brian R. D'Urso
  • Jeremy Levy


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