STM/STS of Few-Layer Topological Semimetal NiTe<sub>2</sub> at 78 K

ORAL

Abstract

NiTe2 is a semimetal which has garnered interest due to recent observation of topological states and Dirac nodes near the Fermi level (EF). Here, Au-assisted exfoliation of bulk NiTe2 is performed to generate a few-layer NiTe2 surface to better understand the evolution of the band structure as a function of film thickness. Scanning tunneling microscopy and spectroscopy measurements are performed at 78 K to probe the local density of electronic states (LDOS) at the surface and around defects. Multiple peaks in the LDOS are observed near EF and are compared to those obtained computationally from density functional theory (DFT) to reveal the nature of these features in the electronic structure.

*D.L. and T.S.R. are supported in part by U.S. Department of Energy Grant DE-FG02-07ER46354.

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Presenters

  • Stephanie Lough

    • Physics and Nanoscience Technology Center, University of Central Florida
    • Physics & Nanoscience Technology Center, University of Central Florida

Authors

  • Stephanie Lough

    • Physics and Nanoscience Technology Center, University of Central Florida
    • Physics & Nanoscience Technology Center, University of Central Florida

  • Duy Le

    • Univ of Central Florida
    • Univeristy of Central Florida
    • Department of Physics, University of Central Florida
    • University of Central Florida
    • Physics and Renewable Energy and Chemical Transformations Cluster, University of Central Florida

  • Brandon Blue

    • Physics and Nanoscience Technology Center, University of Central Florida
    • Physics & Nanoscience Technology Center, University of Central Florida

  • Jesse E Thompson

    • Physics and Nanoscience Technology Center, University of Central Florida
    • Physics & Nanoscience Technology Center, University of Central Florida

  • Talat Rahman

    • Department of Physics, University of Central Florida
    • Physics, Univ of Central Florida
    • University of Central Florida
    • Physics and Renewable Energy and Chemical Transformations Cluster, University of Central Florida

  • Masa Ishigami

    • Univ of Central Florida
    • Physics and Nanoscience Technology Center, University of Central Florida
    • Physics & Nanoscience Technology Center, University of Central Florida