Spectral study of the interplay among lattice, spin, and electron degrees of freedom in a strong correlated polar metal

ORAL

Abstract

The interplay between spin-orbital coupling and structural inversion symmetry breaking in solid states has attracted a lot of interest due to non-trivial electronic and magnetic ground states. Such phenomena are typically observed in compounds of heavy elements in the transitional metal section where large atomic number gives rise to strong spin-orbital coupling. A previous study [1] has reported magnetic anisotropy driven by reconfiguration of electronic properties near Fermi surface at spin reorientation temperature. Here we demonstrate for the oxide compound Ca3Ru2O7 strong correlation among phononic properties, electron reconstruction, and spin reorientation due to spin-orbital coupling and strong electron-phonon correlation. Specifically, strong renormalization of two phonon modes observed experimentally and from the first principle. Our result suggests Raman spectroscopy is a sensitive tool to fermiology changes in strong correlated systems.

[1] Markovic, I. et al. P Natl Acad Sci USA 117, 15524-15529 (2020)

*The work is supported as part of the Computational Materials Sciences Program funded by the U.S. DoE under DE-SC0020145. Partial support was also obtained from DE-SC0012375. The sample synthesis is supported by the Penn State 2DCC-MIP funded by the NSF (DMR-1539916).

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Presenters

  • Huaiyu Wang

    • Department of Material Science and Engineering, Penn State University
    • Pennsylvania State University

Authors

  • Huaiyu Wang

    • Department of Material Science and Engineering, Penn State University
    • Pennsylvania State University

  • Yihuang Xiong

    • Department of Material Science and Engineering, Penn State University

  • Hari Padmanabhan

    • Pennsylvania State University
    • Department of Material Science and Engineering, Penn State University

  • Lujin Min

    • Department of Material Science and Engineering, Penn State University
    • Department of Physics, Pennsylvania State University
    • Physics, Pennsylvania State University
    • Pennsylvania State University
    • Department of Materials Science and Engineering, Pennsylvania State University

  • Yu Wang

    • Department of Physics, Penn State University
    • Physics, Penn State University
    • Physics, The Pennsylvania State University

  • Zhiqiang Mao

    • Pennsylvania State University
    • Department of Physics, Penn State University
    • The Pennsylvania State University
    • Penn State University
    • Physics, Penn State University
    • Department of Physics, Pennsylvania State University
    • Department of Physics, The Pennsylvania State University
    • Physics, The Pennsylvania State University
    • Physics, Pennsylvania State University
    • Department of Materials Science and Engineering, Pennsylvania State University

  • Ismaila Dabo

    • Department of Material Science and Engineering, Penn State University
    • Department of Materials Science and Engineering, Pennsylvania State University

  • Venkatraman Gopalan

    • Pennsylvania State University
    • Material Science and Engineering, Pennsylvania State University
    • Department of Material Science and Engineering, Penn State University
    • Department of Materials Science and Engineering, Pennsylvania State University
    • Materials Science and Engineering, Pennsylvania State University