Orbital wave in the Raman scattering cross section of LaMnO3

ORAL

Abstract

We calculated the polarization-dependent Raman scattering cross-section spectra of LaMnO3 below the A-type magnetic ordering temperature. Two strong peaks appear around the MnO6 octahedra stretching phonon frequency. One mode shows Ag symmetry, while the other mode shows Bg symmetry. We found that the Ag symmetry peak is a Jahn-Teller phonon coupled to the orbital wave and the Bg symmetry peak is an orbital wave mode coupled to a Q2 phonon mode via the Jahn-Teller electron-phonon coupling.

*This research was supported by the National Research Foundation of Korea (Grants No. 2016R1D1A1B03934648 and No. 2016K2A9A1A09914398); by the National Research Foundation of Mongolia (Grant No. SSA 017/2016).

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Presenters

  • Purevdorj Munkhbaatar

    • Institute of Photonics and Information Technology, Jeonbuk National University

Authors

  • Purevdorj Munkhbaatar

    • Institute of Photonics and Information Technology, Jeonbuk National University

  • Myung-Whun Kim

    • Department of Physics, Jeonbuk National University