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Magnetic fluctuations in an XY quantum magnet CoTiO<sub>3</sub>

ORAL

Abstract

Cobalt titanate, CoTiO3 is an easy-plane quantum antiferromagnet with bond-dependent exchange couplings and it has been shown to host topological magnon modes [1, 2]. Magnetic excitations are characterized by fluctuations of phase and amplitude of the magnetic order parameter. Here we report zone center magnon modes that are detectable in both Raman and THz absorption experiments and how transverse and longitudinal magnetic fluctuations associated with these modes are manifested. We quantify the coupling between longitudinal fluctuations and transverse magnons, via analysis of asymmetric spectral line shape.

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Publication: [1] B. Yuan, et al. Phys. Rev. X 10, 011062 (2020)<br>[2] M. Elliot, et al. Nat. Comm. 12, 3936 (2021)

Presenters

  • Jeongheon Choe

    University of Texas at Austin

Authors

  • Jeongheon Choe

    University of Texas at Austin

  • Andrey Baydin

    Rice University

  • David Lujan

    University of Texas at Austin

  • Gaihua Ye

    Texas Tech University

  • Martin A Rodriguez-vega

    Theoretical Division, Los Alamos National Laboratory, University of Texas at Austin, University of Texas at Austin, Northeastern University

  • Fuyang Tay

    Rice University

  • Jiaming He

    University of Texas at Austin

  • Jianshi Zhou

    University of Texas at Austin, The University of Texas at Austin, University of Texas

  • Gregory A Fiete

    Northeastern University, Northeastern University, Massachusetts Institute of Technology

  • Junichiro Kono

    Rice University

  • Rui He

    Texas Tech University

  • Xiaoqin Elaine Li

    University of Texas at Austin