BaTiO3 as electric field controllable reservoir of phonon angular momentum

ORAL

Abstract

We studied the angular momentum of phonons (PAM) in BaTiO3 from first principles. We find that the PAM is four times larger in directions perpendicular to polarization than parallel. Furthermore, PAM is strongly non-linear as a function of BaTiO3 tetragonality. We assign these observations to specific interatomic force constants in the material. Finally, we suggest experiments using BaTiO3 as an electric field controllable phonon angular momentum reservoir.

*This work was supported by grant NSF DMR-1848074.

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Presenters

  • Kevin Moseni

    • Materials Science and Engineering, University of California, Riverside

Authors

  • Kevin Moseni

    • Materials Science and Engineering, University of California, Riverside

  • Sinisa Coh

    • University of California, Riverside
    • Materials Science and Engineering, University of California, Riverside