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

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 () and Fucai Liu ()
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Er Pan: University of Electronic Science and Technology of China
Zefen Li: University of Electronic Science and Technology of China
Fan Yang: University of Electronic Science and Technology of China
Kangdi Niu: Southern University of Science and Technology (SUSTech)
Renji Bian: University of Electronic Science and Technology of China
Qing Liu: University of Electronic Science and Technology of China
Jiangang Chen: University of Electronic Science and Technology of China
Biao Dong: University of Electronic Science and Technology of China
Ruixue Wang: University of Electronic Science and Technology of China
Tingchuan Zhou: University of Electronic Science and Technology of China
Aijun Zhou: University of Electronic Science and Technology of China
Xiao Luo: University of Electronic Science and Technology of China
Junhao Chu: East China Normal University
Junhao Lin: Southern University of Science and Technology (SUSTech)
Wenwu Li: East China Normal University
Fucai Liu: University of Electronic Science and Technology of China

Nature Communications, 2025, vol. 16, issue 1, 1-9

Abstract: Abstract 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.

Date: 2025
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DOI: 10.1038/s41467-025-58105-w

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