Optical and structural properties of type-II multiferroic candidates RbFe(<i>A</i>MO<sub>4</sub>)<sub>2</sub> (<i>A</i> = Mo, Se, S)

ORAL

Abstract

Motivated by the search for type-II multiferroics, we present an optical study of a complex oxide family of type-II multiferroic candidates: RbFe(MoO4)2, RbFe(SeO4)2, and RbFe(SO4)2. We employ rotational-anisotropy second harmonic generation spectroscopy (RA SHG) to address discrepancies in reported space groups. Additionally, we present temperature-dependent linear optical characterizations near the band edge of this family of materials using ultraviolet-visible (UV-VIS) absorption spectroscopy. Included is experimental evidence of the band gap energy and band gap transition type for this family. We also show unreported sub-band gap absorption that reveals prominent optical transitions. Finally, we discuss the impact of these optical transitions as well as the implications of the point symmetries in each material at various temperatures.

*L. Zhao acknowledges support by National Science Foundation CAREER Award No. DMR-1749774. E.Drueke acknowledges support by the NSF Graduate Research Fellowship Program under grant No. DGE-1256260. The work at Rutgers University was supported by the DOE under Grant No. DOE: DE-FG02-07ER46382.

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Presenters

  • Rachel Owen

    • Physics, University of Michigan
    • University of Michigan
    • Physics Department, University of Michigan

Authors

  • Rachel Owen

    • Physics, University of Michigan
    • University of Michigan
    • Physics Department, University of Michigan

  • Elizabeth Drueke

    • Physics, University of Michigan
    • University of Michigan
    • Physics Department, University of Michigan

  • Charlotte Albunio

    • Physics Department, University of Michigan

  • Austin R Kaczmarek

    • University of Michigan
    • Physics Department, University of Michigan

  • Wencan Jin

    • Auburn University
    • Physics, Auburn University
    • University of Michigan
    • Department of Physics, Auburn University

  • Dimuthu Obeysekera

    • New Jersey Inst of Tech
    • Department of Physics, New Jersey Institute of Technology

  • Sang-Wook Cheong

    • Rutgers University, New Brunswick
    • Department of Physics and Astronomy, Rutgers University-New Brunswick
    • Rutgers Center for Emergent Materials, Rutgers University
    • Rutgers, The State University of New Jersey
    • Rutgers University
    • Department of Physics and Astronomy, Rutgers University
    • Center for Quantum Materials Synthesis, Rutgers University
    • Center for Emergent Materials and Department of Physics and Astronomy, Rutgers

  • Junjie Yang

    • New Jersey Institute of Technology
    • Physics, NJ Institute of Technology
    • New Jersey Inst of Tech
    • Department of Physics, New Jersey Institute of Technology

  • Steven Thomas Cundiff

    • Physics, University of Michigan
    • University of Michigan
    • Department of Physics, University of Michigan
    • Physics Department, University of Michigan

  • Liuyan Zhao

    • University of Michigan
    • Physics, University of Michigan
    • University of Michigan - Ann Arbor
    • Physics Department, University of Michigan