Electric field effects in graphene/LaAlO3/SrTiO3 heterostructures and nanostructures

Mengchen Huang; Giriraj Jnawali; Jen-Feng Hsu; Shonali Dhingra; Hyungwoo Lee; Sangwoo Ryu; Feng Bi; Fereshte Ghahari; Jayakanth Ravichandran; Lu Chen; Philip Kim; Chang-Beom Eom; Brian D’Urso; Patrick Irvin; Jeremy Levy

doi:10.1063/1.4916098

APL Materials (Jun 2015)

Electric field effects in graphene/LaAlO3/SrTiO3 heterostructures and nanostructures

Mengchen Huang,
Giriraj Jnawali,
Jen-Feng Hsu,
Shonali Dhingra,
Hyungwoo Lee,
Sangwoo Ryu,
Feng Bi,
Fereshte Ghahari,
Jayakanth Ravichandran,
Lu Chen,
Philip Kim,
Chang-Beom Eom,
Brian D’Urso,
Patrick Irvin,
Jeremy Levy

Affiliations

Mengchen Huang: Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
Giriraj Jnawali: Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
Jen-Feng Hsu: Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
Shonali Dhingra: Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
Hyungwoo Lee: Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
Sangwoo Ryu: Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
Feng Bi: Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
Fereshte Ghahari: Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
Jayakanth Ravichandran: Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
Lu Chen: Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
Philip Kim: Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
Chang-Beom Eom: Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
Brian D’Urso: Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
Patrick Irvin: Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
Jeremy Levy: Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA

DOI: https://doi.org/10.1063/1.4916098
Journal volume & issue: Vol. 3, no. 6
pp. 062502 – 062502-7

Abstract

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We report the development and characterization of graphene/LaAlO3/SrTiO3 heterostructures. Complex-oxide heterostructures are created by pulsed laser deposition and are integrated with graphene using both mechanical exfoliation and transfer from chemical-vapor deposition on ultraflat copper substrates. Nanoscale control of the metal-insulator transition at the LaAlO3/SrTiO3 interface, achieved using conductive atomic force microscope lithography, is demonstrated to be possible through the graphene layer. LaAlO3/SrTiO3-based electric field effects using a graphene top gate are also demonstrated. The ability to create functional field-effect devices provides the potential of graphene-complex-oxide heterostructures for scientific and technological advancement.

Published in APL Materials

ISSN: 2166-532X (Online)
Publisher: AIP Publishing LLC
Country of publisher: United States
LCC subjects: Technology: Chemical technology: Biotechnology; Science: Physics
Website: http://aplmaterials.aip.org

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