Bulk electronic and local magnetic properties of semiconducting 2H-MoTe<sub>2</sub>

ORAL

Abstract

Layered transition metal dichalcogenides are currently intensively investigated due to their opto-electronic, superconducting and topological properties as well as their potential usage as mono-layer building blocks. However, despite their layered nature they often exhibit three dimensional (3D) properties in the bulk. Surprisingly, in semiconducting 2H-MoTe2 long-range magnetic order of unknown origin has recently been observed at low temperature [1]. Here we present the full 3D band structure of 2H-MoTe2, determined with soft X-ray ARPES. We find a pronounced kz dispersion in most bands, consistent with ab-inito calculations, proving the three dimensional character of this material.
Furthermore, we present results of beta detected 8Li NMR measurements and show that the spin-lattice relaxation of the implanted Li ions is inconsistent with long range magnetic order, but supports the presence of magnetic fluctuations. We also find signatures of Li diffusion below room temperature, indicating a potential application in Li battery materials.

[1] Z. Guguchia, et. al., arXiv:1711.05392v2 (2017)

*This work is supported by the Swiss National Science Foundation (SNF-Grant No. 200021_165910).

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Presenters

  • Jonas Krieger

    • Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institut
    • Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute
    • Paul Scherrer Institute

Authors

  • Jonas Krieger

    • Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institut
    • Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute
    • Paul Scherrer Institute

  • Niels Schröter

    • University of Oxford
    • Swiss Light Source, Paul Scherrer Institut
    • Paul Scherrer Institute
    • Paul Scherrer Institut, Swiss Light Source

  • P. K. Biswas

    • ISIS Pulsed Neutron and Muon Source, STFC Rutherford Appleton Laboratory
    • ISIS Neutron and Muon Sources, Science & Technology Facilities Council
    • ISIS Facility, Science and Technology Facilities Council Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Chilton, Didcot OX11 0QX, UK.
    • ISIS, STFC Rutherford Appleton Laboratory, Didcot, Oxfordshire OX11 0QX, UK

  • Aris Christos Chatzichristos

    • Department of Physics and Astronomy, University of British Columbia

  • Derek Fujimoto

    • Department of Physics and Astronomy, University of British Columbia
    • Physics and Astronomy, University of British Columbia

  • Stefan Holenstein

    • Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institut
    • Physik-Institut, Universität Zürich

  • Victoria Karner

    • Departament of Chemistry, University of British Columbia
    • Chemistry, University of British Columbia

  • Ryan McFadden

    • Departament of Chemistry, University of British Columbia
    • Chemistry, University of British Columbia

  • John Ticknor

    • Departament of Chemistry, University of British Columbia

  • W Andrew MacFarlane

    • Departament of Chemistry, University of British Columbia
    • Chemistry, University of British Columbia
    • Department of Chemistry, University of British Columbia

  • Robert F Kiefl

    • Department of Physics and Astronomy, University of British Columbia
    • Physics and Astronomy, University of British Columbia
    • Department of Physics & Astronomy and Stewart Blusson Quantum Matter Institute, University of British Columbia

  • Geetha Balakrishnan

    • University of Warwick
    • Physics Department, University of Warwick
    • Department of Physics, University of Warwick
    • Physics, University of Warwick

  • Vladimir Strocov

    • Swiss Light Source, Paul Scherrer Institut
    • Paul Scherrer Institute

  • Zaher Salman

    • Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institut
    • Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute
    • Paul Scherrer Institut