Spin - Phonon Coupling in thin film NiO: UV and Visible Raman Spectroscopy Investigation

ORAL

Abstract

Nickel oxide (NiO) is an antiferromagnetic insulator with a crystalline structure consisting of ferromagnetically aligned (111) planes. This material has recently attracted significant attention owing to proposals for spintronic applications in the THz frequency regime. Raman spectroscopy can provide valuable information on the phonon and magnon states in such materials, and can possibly shed light on specifics of the phonon – magnon interactions. Here, we report a comparative Raman spectroscopic investigation of (111)-oriented NiO single crystals and NiO(111) thin films under ultraviolet (UV) and visible laser excitations, and we compare the bulk results with thin film results to explore the dimension effect. The measurements were conducted in the backscattering configuration under the laser excitation wavelength of 325 nm (resonant) and 488 nm (non-resonant). M. M. Lacerda et al., APL. 110, 202406 (2017).

*This work was supported by SHINES, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Basic Energy Sciences (BES) under Award # SC0012670. Simulations used XSEDE, NSF ACI-1548562; allocation TG-DMR130081.

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Presenters

  • Ece Aytan

    • Electrical and computer Engineering, Univ of California - Riverside
    • Department of Electrical and Computer Engineering, University of California, Riverside
    • Electrical and Computer Engineering, University of California, Riverside
    • Material Science and Engineering, University of California Riverside

Authors

  • Ece Aytan

    • Electrical and computer Engineering, Univ of California - Riverside
    • Department of Electrical and Computer Engineering, University of California, Riverside
    • Electrical and Computer Engineering, University of California, Riverside
    • Material Science and Engineering, University of California Riverside

  • Fariborz Kargar

    • Department of Electrical and Computer Engineering/Materials Science and Engineering Program, University of California, Riverside
    • Electrical and Computer Engineering, University of California, Riverside
    • Electrical and Computer Engineering, University of California Riverside

  • Junxue Li

    • Univ of California - Riverside
    • Physics and Astronomy, University of Calirfornia, Riverside
    • Physics, Univ of California - Riverside
    • University of California, Riverside
    • Physics and Astronomy Department, University of California Riverside

  • Weiwei Lin

    • Physics and Astronomy Department, Johns Hopkins University

  • Bishwajit Debnath

    • Electrical and computer Engineering, Univ of California - Riverside
    • Electrical and Computer Engineering, University of California, Riverside
    • Department of Electrical and Computer Engineering, University of California, Riverside
    • Department of Electrical and Computer Engineering, Univ of California - Riverside
    • Electrical and Computer Engineering, University of California Riverside

  • Roger Lake

    • Electrical and computer Engineering, Univ of California - Riverside
    • Department of Electrical and Computer Engineering, University of California, Riverside
    • University of California, Riverside
    • Univ of California - Riverside
    • Electrical and Computer Engineering, University of California, Riverside
    • University of Califoria Riverside
    • University of California Riverside
    • Department of Electrical and Computer Engineering, Univ of California - Riverside
    • Electrical and Computer Engineering, University of California Riverside

  • Chia-Ling Chien

    • Department of Physics and Astronomy, Johns Hopkins Univ
    • Physics and Astronomy Department, Johns Hopkins University

  • Jing Shi

    • Univ of California - Riverside
    • Physics and Astronomy, University of Calirfornia, Riverside
    • University of California, Riverside
    • Physics, Univ of California - Riverside
    • Physics and Astronomy Department, University of California Riverside

  • Alexander Balandin

    • Electrical and Computer Engineering , University of California
    • Electrical and Computer Engineering, University of California Riverside
    • Electrical and computer Engineering, Univ of California - Riverside
    • Department of Electrical and Computer Engineering/Materials Science and Engineering Program, University of California, Riverside
    • Department of Electrical and Computer Engineering, University of California, Riverside
    • Electrical and Computer Engineering, University of California, Riverside
    • University of California Riverside