The Role of the Moire Pattern on the Electronic Band Structure of Mono- to Few Layer MoS2

ORAL

Abstract

Using low temperature high resolution scanning tunneling microscopy and spectroscopy (STM/STS) we have investigated MoS2 grown by chemical vapor deposition (CVD) on a substrate of highly oriented pyrolytic graphite (HOPG). Atomic resolution images reveal clear Moir\'{e} patterns, which in general arise due to a lattice mismatch or rotational misalignment between weakly interacting MoS2 layers and between the first MoS2 layer and the substrate. The quasi-particle band-gap was analyzed as a function of the lattice rotation. Changes in the band structure were supported by density functional theory (DFT) calculations.

*This work was supported as a part of the Center for the Computational Design of Functional Layered Materials, an Energy Research Frontier Center funded by the U.S. DOE, BES under Award DE-SC0012575

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Authors

  • D. Trainer

    • Physics Department, Temple University, Philadelphia PA 19122, USA

  • A. Putilov

    • Physics Department, Temple University, Philadelphia PA 19122, USA

  • T. Saari

    • Department of Physics, Tampere University of Technology, Tampere, Finland

  • Tay-Rong Chang

    • Department of Physics, National Tsing Hua University, Hsinchu 30013, Taiwan
    • National Tsing Hua U.

  • H.-T. Jeng

    • Department of Physics, National Tsing Hua University, Hsinchu 30013, Taiwan

  • Hsin Lin

    • Graphene Research Ctr and Dept of Phys, Natl Univ of Singapore
    • Department of Physics, National University of Singapore, Singapore 117546
    • National University of Singapore
    • Centre for Advanced 2D Materials and Graphene Research Centre, National University of Singapore, 6 Science Drive 2, Singapore 117546
    • Natl Univ of Singapore

  • B. Wang

    • Physics Department, Northeastern University, Boston MA 02115, USA

  • Chris Lane

    • Physics Department, Northeastern University, Boston MA 02115, USA
    • Northeastern U.
    • Northeastern University

  • J. Nieminen

    • Physics Department, Northeastern University, Boston MA 02115, USA

  • Arun Bansil

    • Physics Department, Northeastern University, Boston MA 02115, USA
    • Northeastern University
    • Northeastern Univ

  • Xiaoxing Xi

    • Temple University
    • Temple University, Department of Physics, Philadelphia PA 19122
    • Physics Department, Temple University, Philadelphia PA 19122, USA
    • Department of Physics, Temple University, Philadelphia, PA, USA
    • Temple Univ

  • M. Iavarone

    • Physics Department, Temple University, Philadelphia PA 19122, USA