Presentation Information
[3B02]Nonlinear responses in materials with broken inversion symmetry
*Yuichiro Ando1 (1. Graduate School of Engineering, Osaka Metropolitan University)
Nonlinear phenomena have long attracted attention, especially with the advent of two-dimensional and topological materials and advances in quantum well and metamaterial fabrication. This talk covers two topics related to nonlinear effects in inversion-asymmetric systems. The first is a controllable, non-volatile ferroic Berry curvature dipole (BCD)-driven nonlinear Hall effect at room temperature in the topological crystalline insulator Pb1-xSnxTe. The second is the magneto-photogalvanic effect in conventional metals, where spin accumulation from the spin Hall effect locally breaks symmetries to generate nonlinear photocurrents. These findings demonstrate that even simple single-element metals exhibit complex nonlinear phenomena, opening new directions in materials science.