Ferroelectricity-driven angular momentum textures: from spins and orbitals to Berry curvatures

Abstract

In symmetry-broken crystalline solids, pole structures of angular momentum textures such as spin and orbital angular momentum, and Berry curvature (BC) can emerge, which have been utilized for various electronics and spintronics applications. For example, the monopole component of the BC is induced by the time-reversal symmetry breaking, and the BC dipole arises from a lack of inversion symmetry, leading to the anomalous Hall and nonlinear Hall effects, respectively. In this talk, we show that the ferroelectricity can couple to unique spin, orbital and BC distribution, which indeed offers charge- and spin-controllable photocurrents. We also verify the fundamental relation between ferroelectricity and the dipole component of the angular momentum and BC textures. Ferroelectricity can be a useful and fundamental tool to control the various pseudo-vector textures and the corresponding nonlinear optoelectronic responses.