Synthesis of large area and high quality MoS<sub>2</sub> on Au(111) monolayers with single domain orientation

ORAL

Abstract

The employment of transition metal dichalcogenides, and in particular single layer (SL) MoS2 for electronic devices, demands for a controllable growth of highly crystalline layers featuring large area with a low concentration of defects to preserve their outstanding electronic properties. Moreover, thanks to the peculiar electronic structure, new degrees of freedom are accessible allowing for spin- and valley-dependent phenomena, that can be retained in devices only through singly-oriented domains. Current chemical vapor deposition methods have not been able to achieve this and have produced mirror twin domains leading to the formation of domain boundaries and dislocations in the layer.
We present a protocol for the synthesis through physical vapor deposition of SL MoS2 on Au(111) with a single domain orientation. We demonstrate the structural properties using a combination of surface science techniques, including scanning tunneling microscopy and photoelectron diffraction. Angular resolved photoemission measurements (ARPES) confirmed the single layer character and the high structural quality of MoS2 while the single domain orientation allowed the measurement, through Spin-resolved ARPES, of the complete spin polarization with spin reversal of the states near K and -K points.

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Presenters

  • Daniel Lizzit

    • Elettra - Sincrotrone Trieste S.C.p.A.

Authors

  • Harsh Bana

    • Department of Physics, University of Trieste
    • Elettra Sincrotrone Trieste

  • Elisabetta Travaglia

    • Department of Physics, University of Trieste

  • Luca Bignardi

    • Elettra - Sincrotrone Trieste S.C.p.A.
    • Elettra Sincrotrone Trieste

  • Paolo Lacovig

    • Elettra - Sincrotrone Trieste S.C.p.A.
    • Elettra Sincrotrone Trieste

  • Charlotte Sanders

    • Department of Physics and Astronomy, Interdisciplinary Nanoscience Center (iNANO), Aarhus University
    • Aarhus Univ

  • Maciej Dendzik

    • Department of Physics and Astronomy, Interdisciplinary Nanoscience Center (iNANO), Aarhus University
    • Aarhus Univ

  • Matteo Michiardi

    • Department of Physics and Astronomy , University of British Columbia
    • QMI - UBC
    • Quantum Matter Institute, Univ. of British Columbia
    • Quantum Matter Institute
    • Quantum Matter Institute, Univ of British Columbia

  • Marco Bianchi

    • Department of Physics and Astronomy, Interdisciplinary Nanoscience Center (iNANO), Aarhus University
    • Aarhus Univ

  • Daniel Lizzit

    • Elettra - Sincrotrone Trieste S.C.p.A.

  • Francesco Presel

    • Department of Physics, University of Trieste

  • Dario De Angelis

    • Department of Physics, University of Trieste

  • Nicoleta Apostol

    • National Institute of Materials Physics

  • Pranab Das

    • IOM-CNR, Laboratorio TASC, AREA Science Park

  • jun fujii

    • IOM-CNR, Laboratorio TASC, AREA Science Park

  • Ivana Vobornik

    • IOM-CNR, Laboratorio TASC, AREA Science Park

  • Rosanna Larciprete

    • CNR-Institute for Complex Systems

  • Alessandro Baraldi

    • Department of Physics, University of Trieste

  • Philip Hofmann

    • Department of Physics and Astronomy, Interdisciplinary Nanoscience Center (iNANO), Aarhus University
    • Physics and Astronomy, Aarhus University
    • Aarhus Univ

  • Silvano Lizzit

    • Elettra - Sincrotrone Trieste S.C.p.A.
    • Elettra Sincrotrone Trieste