Photo-induced electric polirization in hybrid improper ferroelectrics

ORAL

Abstract

Hybrid improper ferroelectrics form a class of materials for which the electric polarization is induced by two octahedral tilting modes, that are in-phase and antiphase tiltings. Interestingly, in conventional ferroelectrics, light has the tendency to suppress electrical polarization while enhancing tiltings. One may thus wonder what is the effect of light on electric polarization in hybrid improper ferroelectrics. Here, we use density functional theory and a novel light-matter ab-initio scheme [Physical Review Letters 123, 087601 (2019)] to address this question. Our study demonstrates that light can be a useful tool to drive and control polarization in original ferroelectric devices.

*LG and LB acknowledge the support from the Grant MURI ETHOS W911NF-21-2-0162 from Army Research Office (ARO). C.P. and L.B. thank ARO Grant No. W911NF-21-1-0113.

–

Presenters

  • Lingyuan Gao

    • University of Arkansas
    • University of Pennsylvania

Authors

  • Lingyuan Gao

    • University of Arkansas
    • University of Pennsylvania

  • Charles Paillard

    • Laboratoire Structures, Propriétés et Modélisation des Solides, CentraleSupélec, CNRS UMR 580, Université Paris-Saclay, 91190 Gif-sur-Yvette, France
    • University Paris-Saclay
    • SPMS Centrale Supelec Université Paris Saclay

  • Laurent Bellaiche

    • Physics Department and Institute for Nanoscience and Engineering, University of Arkansas, Fayetteville, Arkansas 72701, USA
    • University of Arkansas