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Coupling of graphene nanoribbons to LaAlO<sub>3</sub>/SrTiO<sub>3</sub> electron waveguides via nanoscale vias

ORAL

Abstract

Graphene nanoribbons (GNRs) have many interesting electronic properties [1] that can be tuned by chemical synthesis, which make them promising candidates for many quantum applications such as quantum information processing. LaAlO3/SrTiO3 (LAO/STO) interface offers a back-gate-switchable metal-insulator transition by either using conductive atomic force microscope lithography (c-AFM lithography) [2] or using ultra-low-voltage electron beam lithography (ULV-EBL) [3], which allows for the creation of reconfigurable nanostructures. Here we describe efforts to electronically couple GNRs to LAO/STO electron waveguides through nanoscale vias which are etched nano regions where LAO is removed.  GNRs are directly placed in the nano-vias using an AFM-based technique [4], and electrical contact to the GNRs is achieved by c-AFM or ULV-EBL. 

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Publication: [1] Vo, T. H. et al. Chem. Commun. 50, 4172 (2014)<br>[2] Cen, C., et al. Science 323, 1026 (2009)<br>[3] Yang, D. et al., Appl. Phys. Lett. 117, 253103 (2020)<br>[4] Sheridan, E. et al. APL Materials 9, 071101 (2021)

Presenters

  • Ahmed Omran

    University of Pittsburgh

Authors

  • Ahmed Omran

    University of Pittsburgh

  • Dengyu Yang

    University of Pittsburgh, Pittsburgh Quantum Institute

  • Juliana Sebolt

    University of Pittsburgh

  • Ki-Tae Eom

    University of Wisconsin - Madison, University of Wisconsin-Madison, Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA, University of Wisconsin Madison

  • Chang-Beom Eom

    University of Wisconsin - Madison, Oxide Laboratory, University of Wisconsin - Madison

  • Alexander Sinitskii

    University of Nebraska - Lincoln, Department of Chemistry, University of Nebraska-Lincoln

  • Patrick R Irvin

    University of Pittsburgh

  • Jeremy Levy

    University of Pittsburgh, University of Pittsburgh, Department of Physics and Astronomy, Pittsburgh, PA 15260, USA