Observation and manipulation of two-dimensional topological polar texture confined in moiré interface

作者：Er Pan, Zefen Li, Fan Yang, Kangdi Niu, Renji Bian, Qing Liu, Jiangang Chen, Biao Dong, Ruixue Wang, Tingchuan Zhou, Aijun Zhou, Xiao Luo, Junhao Chu, Junhao Lin, Wenwu Li, Fucai Liu · 发表于：Nature Communications · 年份：2025 · DOI：10.1038/s41467-025-58105-w · 被引用次数：12 · 研究领域：Multiferroics and related materials、Advanced Materials and Mechanics、Magnetic properties of thin films

Topological polar structures in ferroelectric thin films have become an emerging research field for exotic phenomena. Due to the prerequisite of the intricate balance among the intrinsic dipolar anisotropy, the imposed electric and mechanical boundary, the topological polar domains are predominantly formed within complex oxides. Here, combining the microscopic polarization measurement via Piezoresponse Force Microscopy and the atomic displacement mapping via Scanning Transmission Electron Microscopy, we report the direct observation of atomically thin topological polar textures in twisted boron nitride system, which is well confined at the twisted interface. Leveraging the advantages of the sliding switching mechanism and atomically thin nature, we demonstrate nonvolatile manipulation of the topological polar textures, which is crucial for potential applications. This result provides opportunities to create truly 2D topological polar textures with dynamical controllability, which would render the exploration on the previously unknown physical phenomena and functional devices feasible. The authors achieve nonvolatile manipulation of atomically thin topological polar textures in twisted boron nitride, enabling a tunable platform for exploring topological phenomena and high-density nanoelectronic devices.