Reconfigurable graphene-based 2D quantum materials

ORAL

Abstract

Reprogrammable LaAlO3/SrTiO3-based nanostructures offer new approaches to the development of quantum materials. With the recently founded ability of ultra-low-voltage electron beam lithography (ULV-EBL), sub-10 nm resolution nanostructures can be patterned through boron nitride encapsulated graphene at the LaAlO3/SrTiO3 interface. This method enables the creation of doubly periodic electrostatic potentials to be applied to high-mobility graphene. Period structures like Kagome and Lieb lattice can be programmed without changing the underlying physical layers. This approach is part of a more general effort to create a solid state platform for quantum simulation in two dimensions.

*JL acknowledges support from NSF PHY-1913034. JL and CBE acknowledge support from ONR MURI N00014-21-1-2437. BH, JL, PRI and CBE acknowledge support from DOE-QIS. The work at University of Wisconsin-Madison (Synthesis of thin film heterostructures and characterizations) was supported by US Department of Energy (DOE), Office of Basic Energy Sciences (BES), under award number DE-FG02-06ER46327 (C.B.E.).

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Publication: Yang, D. et al., Appl. Phys. Lett. 117, 253103 (2020)

Presenters

  • Dengyu Yang

    • University of Pittsburgh
    • Pittsburgh Quantum Institute

Authors

  • Dengyu Yang

    • University of Pittsburgh
    • Pittsburgh Quantum Institute

  • Qingrui Cao

    • Carnegie Mellon University

  • 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

  • Benjamin M Hunt

    • Carnegie Mellon Univ
    • Carnegie Mellon University

  • Jeremy Levy

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