Engineering Freestanding Oxide Membranes for Novel Ferroelectric Domain Structures with Unique Functionalities

The excellent tunability of freestanding oxide membranes provides unprecedented opportunities for the exploration of novel ferroelectric domain structures with unique functionalities. In this talk, I will present the realization of topological ferroelectric domain structures and discuss their potential applications. For the skyrmion-like polar nanodomains, their topology can be switched reversibly by external electric field, which substantially modifies the resistive behaviors [1]. In addition, we also designe a new type of micron-scale ferroelectric domain structure and demonstrate its efficient light modulation capability [2]. All these new advances demonstrate the great potential of ferroelectric oxide membranes in nonvolatile memory and optical applications.<br/><br/>[1] L. Han et al. <i>Nature</i> 603, 63–67 (2022)<br/>[2] H.Y. Sun et al. <i>in preparation</i>