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. 

*JL acknowledges ONR N00014-20-1-2481 and ONR MURI N00014-21-1-2437. The research at the University of Wisconsin-Madison is funded by the Gordon and Betty Moore foundation's EPiQS initiative, grant GBMF9065 to C.B.E. and Vannevar Bush Faculty Fellowship (ONR N00014-20-1-2844).

–

Publication: [1] Vo, T. H. et al. Chem. Commun. 50, 4172 (2014)
[2] Cen, C., et al. Science 323, 1026 (2009)
[3] Yang, D. et al., Appl. Phys. Lett. 117, 253103 (2020)
[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