Optical Properties of Complex Oxides RbFe(MoO<sub>4</sub>)<sub>2</sub>, RbFe(SO<sub>4</sub>)<sub>2</sub>, and RbFe(SeO<sub>4</sub>)<sub>2</sub>

ORAL

Abstract

The structural and magnetic properties of the archetype type-II multiferroic RbFe(MoO4)2 have been well studied due to interest in the low temperature antiferromagnetic order and its coupling to the induced ferroelectric order. However, little is known about the optical properties of this complex oxide. There have been low energy spectroscopic characterizations, but no reported linear characterization up into the band edge. Here we explore a group of similar such complex oxides: RbFe(MoO4)2, RbFe(SO4)2, and RbFe(SeO4)2. Substitution of the A-site in RbFe(AO4)2 can result in comparable, spectrally tunable absorption features that appear below the optical transition band edges. Their absorption spectra show strikingly similar thickness and temperature dependence, despite their different growth conditions and electronic/magnetic properties. We further discuss the potential origin and impact of these tunable optical transition states in the RbFe(AO4)2 complex oxide family.

*NSF CAREER Grant No. DMR-1749774

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Presenters

  • Rachel Owen

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

Authors

  • Rachel Owen

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

  • Elizabeth Drueke

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

  • Charlotte Albunio

    • Department of Physics, University of Michigan

  • Alemayehu S Admasu

    • Rutgers Center for Emergent Materials, Rutgers University
    • Rutgers University, New Brunswick

  • Junjie Yang

    • Physics, New Jersey Institute of Technology
    • Department of Physics, New Jersey Institute of Technology
    • New Jersey Institute of Technology
    • Physics, Central Michigan University
    • Central Michigan University

  • Sang-Wook Cheong

    • Rutgers University
    • R-CEM & Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA
    • Rutgers Center for Emergent Materials, Rutgers University
    • Department of Physics and Astronomy, Center for Emergent Materials, Rutgers University; Max Planck POSTECH/Korea Research Initiative, Pohang University of Science and Technol
    • Physics and Astronomy, Rutgers University
    • Rutgers University, Physics and Astronomy, and Laboratory for Pohang Emergent Materials and Max Plank POSTECH Center for Complex Phase Materials, Pohang University of Science
    • Rutgers Center for Emergent Materials and Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA
    • Rutgers University, Piscataway
    • Department of Physics and Astronomy, Rutgers University, New Brunswick
    • Department of Physics and Astronomy, Rutgers University
    • Department of Physics, Rutgers University
    • Physics & Astronomy, Rutgers University
    • Rutgers Center for Emergent Materials and Department of Physics and Astronomy, Rutgers University
    • Rutgers University, New Brunswick
    • Physics, Rutgers University
    • Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA

  • Steven Thomas Cundiff

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

  • Liuyan Zhao

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