Transport Measurements to probe Electronic States of Semiconducting and Metallic Graphene Nanoribbons

ORAL

Abstract

Graphene nanoribbons (GNRs) have unique electronic properties that can potentially be used to develop electron spin-based qubits. The LaAlO3/SrTiO3 (LAO/STO) correlated nanoelectronics platform [1] enables single GNRs to be addressed both optically and electrically. Here we use a LAO/STO-based sketched waveguide [2] to probe the energy structure of GNRs. By coupling the conducting channel with GNRs we can study the transport properties of semiconducting versus metallic GNRs. These GNRs are expected to be influenced by local electric fields from proximal sketched gates as well as global magnetic fields which can Zeeman split the energy states. This information is complementary to other probes, e.g., THz spectroscopy [3] and STM which also provide detailed information about the electronic structures of these GNR-based spin qubit candidates.

[1] Cen, C., et al. Science 323, 1026–1030 (2009)

[2] Anaddi, A. et al. Nano Lett. 18, 7, 4473-4481 (2018)

[3] Sheridan, E. et al. APL Materials 9, 071101 (2021)

* JL, CBE, and AS acknowledge ONR MURI N00014-21-1-2437. CBE acknowledges the Gordon and Betty Moore Foundation’s EPiQS Initiative, Grant GBMF9065 and a Vannevar Bush Faculty Fellowship (ONR N00014-20-1-2844). Transport measurement at the University of Wisconsin–Madison was supported by the US Department of Energy (DOE), Office of Science, Office of Basic Energy Sciences (BES), under award number DE-FG02-06ER46327.

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Presenters

  • Juliana Sebolt

    University of Pittsburgh

Authors

  • Juliana Sebolt

    University of Pittsburgh

  • Muqing Yu

    University of Pittsburgh

  • Mamun Sarker

    University of Nebraska-Lincoln, University of Nebraska - Lincoln

  • Kyoungjun Lee

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

  • Alexander Sinitskii

    University of Nebraska - Lincoln

  • Patrick Irvin

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

  • Jeremy Levy

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