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.

–

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