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Electronic Structure and Properties of 2M WS<sub>2</sub>

ORAL

Abstract

The recently observed Majorana Zero Mode (MZM) in 2M Phase of Tungsten Disulfide (2M WS2) opens a new opportunity in the applications in quantum computing. The topologically protected quantum state can overcome issues such as decoherence and noise induced by local fluctuations to reduce the errors produced during computation by braiding the MZMs in topological superconductors. 2M WS2 is a recently confirmed intrinsic topological superconductor with a high superconducting transition temperature of 8.8 K, which provides an excellent playground to explore the novel properties of the MZMs. In this work, we explore the electronic structure of 2M WS2 using STM and angle resolved photoemission spectroscopy (ARPES). We observed defect/impurity induced doping, resulting in a ~10 meV shift in the dI/dV spectrum. We also observed a twisting distortion of ~8 degrees off the crystallographic axis in STM atomic resolution images. This twisting distortion has also been reported in other transition metal dichalcogenides (TMD)s, indicating this distortion might be a universal phenomenon in TMD materials. Finally, the preliminary ARPES data exhibits dispersive bands, qualitatively agreeing with the DFT calculated band structures.

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Presenters

  • William Scougale

    Physics and Astronomy, University of Wyoming

Authors

  • William Scougale

    Physics and Astronomy, University of Wyoming

  • Rabindra Dulal

    Physics and Astronomy, University of Wyoming, University of Wyoming

  • Piumi Samarawickrama

    Physics and Astronomy, University of Wyoming, University of Wyoming

  • Joseph McBride

    Chemistry, University of Wyoming

  • Brian Leonard

    Chemistry, University of Wyoming, University of Wyoming

  • John Ackerman

    Chemical Engineering, University of Wyoming, University of Wyoming

  • Jifa Tian

    Physics and Astronomy, University of Wyoming, University of Wyoming

  • Sung-Kwan Mo

    Lawrence Berkeley National Laboratory, Advanced Light Source, Lawrence Berkeley National Laboratory, Advanced Light Source

  • Eli Rotenberg

    Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, USA, Lawrence Berkeley National Laboratory, Lawrence Berkeley National Lab, Advanced Light Source, Advanced Light Source, Lawrence Berkeley National Laboratory, Advanced Light Source, Advanced Light Source, Lawrence Berkeley National Lab, LBNL

  • Te-Yu Chien

    Physics and Astronomy, University of Wyoming, University of Wyoming