Coupling between elementary excitations in CoTiO<sub>3</sub>

ORAL

Abstract

Neutron scattering experiments have revealed Dirac magnon dispersion and spin-orbit excitations in a 3D quantum XY magnet CoTiO3. Here, we investigate unique phonon properties in this material using magneto-Raman spectroscopy. The coupling between spin-orbit excitations and phonons endows large magnetic moments to two Eg phonon modes. We report the evolution of phonon spectra as a function of an external magnetic field, polarization, and temperature in CoTiO3.

*We gratefully acknowledge the support from NSF MRSEC via grant DMR-1720595, DMR-2114825, and NSF DMR-2104036

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Presenters

  • David Lujan

    • University of Texas at Austin

Authors

  • David Lujan

    • University of Texas at Austin

  • Jeongheon Choe

    • University of Texas at Austin

  • Gaihua Ye

    • Texas Tech University

  • Swati Chaudhary

    • Northeastern University
    • University at Texas at Austin
    • Caltech
    • The University of Texas at Austin, Northeastern University, Massachusetts Institute of Technology
    • University of Texas at Austin
    • The university of Texas at Austin

  • Cynthia Nnokwe

    • 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

  • Jiaming He

    • University of Texas at Austin

  • Frank Y Gao

    • University of Texas at Austin

  • Timothy N Nunley

    • 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

  • Rui He

    • Texas Tech University

  • Xiaoqin Elaine Li

    • University of Texas at Austin