Addition Spectroscopy of 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 single electron transistor (SketchSET) [2] to probe the energies at which a single electron is added to a GNR. This addition energy spectrum [3] is 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 [4] and STM which also provide detailed information about the electronic structures of these GNR-based spin qubit candidates.

*JL acknowledges ONR N00014-20-1-2481 and ONR MURI N00014-21-1-2437.

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Publication: [1] Cen, C., et al. Science 323, 1026–1030 (2009)
[2] Cheng, G. et al. Nat. Nanotechnol. 6, 343–347 (2011)
[3] Tarucha, et al. Phys. Rev. Lett. 77, 3613–3616 (1996)
[4] Sheridan, E. et al. APL Materials 9, 071101 (2021)

Presenters

  • Juliana Sebolt

    • University of Pittsburgh

Authors

  • Juliana Sebolt

    • University of Pittsburgh

  • Muqing Yu

    • 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

  • Patrick R Irvin

    • University of Pittsburgh

  • Jeremy Levy

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