Ferromagnetism in Single Crystal MoS$_2$

ORAL

Abstract

We report on the magnetic properties of MoS$_2$ flakes measured from room temperature down to 10 K and magnetic fields up to 5 Tesla. Molybdenum disulfide (MoS$_2$) is one of the most stable layered transition metal dichalcogenides, which has a finite band gap and is regarded as a complementary (quasi-) 2D material to graphene. We find that single crystals of MoS$_2$ display ferromagnetism superimposed onto a large temperature-dependent diamagnetism and observe that ferromagnetism persists from 10 K up to room temperature. We attribute the existence of ferromagnetism partly to the presence of zigzag edges in the magnetic ground state at the grain boundaries. Since the magnetic measurements are relatively insensitive to the interlayer coupling, these results are expected to be also valid in the single layer limit.

*This work is supported by the Office of Naval Research and National Science Foundation

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Authors

  • Sima Saeidi Varnoosfaderani

    • Department of Physics, University of Florida

  • Sefaattin Tongay

    • Department of Material Science and Engineering, University of California, Berkeley

  • Bill Appleton

    • Nanoscience Institute for Medical and Engineering, University of Florida

  • Junqiao Wu

    • Department of Material Science and Engineering, University of California, Berkeley
    • Department of Materials Science and Engineering, University of California, Berkeley, California 94720, USA

  • Arthur Hebard

    • University of Florida
    • Physics department, University of Florida, Gainesville, Florida
    • Department of Physics, University of Florida
    • Department of Physics, University of Florida, Gainesville, Florida 32611, United States
    • Department of Physics, University of Florida, Gainesville FL 32611-8440