Magneto-Raman Spectroscopy on Vanadium-derived Lacunar Spinel GaV<sub>4</sub>S<sub>8</sub>

POSTER

Abstract

GaV4S8(GaVS) is a magnetic semiconductor with a Neel-type skyrmion phase lattice displaying multiferroic properties [1]. Magnetic susceptibility measurements indicate the presence of a structural transition at 42 K followed by a ferromagnetic order at 12 K [2]. Recent temperature-dependent infrared and Raman spectroscopic measurements identified the various phonon modes and the presence of Jahn-Teller distortions in this compound [3]. To obtain more detailed information on the various exchange interactions in this compound, we performed magneto-Raman measurements at magnetic fields up to 14 T at temperature down to 5 K. In this poster I will present the main results of our magneto-Raman investigations and its implications.
References:[1] I. Kézsmárki et al. Nat. Matter. 14, 1116 (2015). [2] C.S. Yadav et al. Phys. Rev. B: Condens. Matter. 403, 1474 (2008). [3] J. Hlinka et al. Phys. Rev. B. 94, 060104 (2016)

*Work at NHMFL was supported by NSF DMR-1157490 and the state of Florida. The project is also funded by DoN HBCU/MI program.

Presenters

  • Gary Knight

    • Physics, Florida A&M University

Authors

  • Gary Knight

    • Physics, Florida A&M University

  • Zhengguang Lu

    • National High Magnetic Field Laboratory
    • Florida State Universtiy
    • Physics, Florida State University
    • Natl High Magnetic Field Lab
    • NHMFL, FSU

  • Ganesh Pokharel

    • Materials Science and Engineering, University of Tennessee
    • University of Tennessee, Knoxville
    • Univ of Tennessee, Knoxville

  • Hasitha Suria Arachchige

    • Materials Science and Engineering, University of Tennessee
    • Univ of Tennessee, Knoxville

  • Andrew Christianson

    • Neutron Scattering Division, Oak Ridge National Laboratory
    • Oak Ridge National Laboratory

  • David Mandrus

    • Department of Materials Science and Engineering, The University of Tennessee
    • Oak Ridge National Lab
    • Oak Ridge National Laboratory
    • Department of Materials Science and Engineering, University of Tennessee
    • University of Tennessee
    • Materials Science and Technology, Oak Ridge National Laboratory
    • Materials Science and Engineering, The University of Tennessee
    • Materials Science and Engineering, University of Tennessee
    • Material Science and Technology Division, Oak Ridge National Laboratory
    • Oakridge National Laboratory
    • University of Tennessee, Knoxville
    • Univ of Tennessee, Knoxville

  • Dmitry Smirnov

    • 1800 East Paul Dirac Drive, Natl High Magnetic Field Lab
    • Natl High Magnetic Field Lab
    • National High Magnetic Field Laboratory
    • NHMFL
    • Condensed Matter Science, National High Magnetic Field Laboratory
    • NHMFL, FSU

  • Komalavalli Thirunavukkuarasu

    • Florida A&M Univ
    • Physics, Florida A&M University
    • Florida A&M University
    • Florida A&M Univ.