Intrinsic ferroelectric CuVP2S6 for potential applications in neuromorphic recognition and translation

Chunyu Zhao, Weikang Dong, Yang Yang, Hongbin Yu, Jingyi Duan, Denan Kong, Kangshu Li, Xiaocang Han, Chao Yun, Tingjun Wang, Ping Wang, Yang Zhao, Jijian Liu, Qingmei Hu, Lin Jia, Ying Zhang, Hui Ai, Shanshan Wang, Dian Li, Tianyu Zang, Yao Guo, Xueyun Wang, Xiaoxu Zhao, Yao Zhou and Jiadong Zhou ()
Additional contact information
Chunyu Zhao: Beijing Institute of Technology
Weikang Dong: Beijing Institute of Technology
Yang Yang: Beijing Institute of Technology
Hongbin Yu: Beijing Institute of Technology
Jingyi Duan: Beijing Institute of Technology
Denan Kong: Beijing Institute of Technology
Kangshu Li: Peking University
Xiaocang Han: Peking University
Chao Yun: Nanjing University of Aeronautics and Astronautics
Tingjun Wang: Beijing Institute of Technology
Ping Wang: Beijing Institute of Technology
Yang Zhao: Beijing Institute of Technology
Jijian Liu: Beijing Institute of Technology
Qingmei Hu: Beijing Institute of Technology
Lin Jia: Beijing Institute of Technology
Ying Zhang: Beijing Institute of Technology
Hui Ai: Beijing Institute of Technology
Shanshan Wang: Beijing Institute of Technology
Dian Li: Beijing Institute of Technology
Tianyu Zang: Beijing Institute of Technology
Yao Guo: Beijing Institute of Technology
Xueyun Wang: Beijing Institute of Technology
Xiaoxu Zhao: Peking University
Yao Zhou: Beijing Institute of Technology
Jiadong Zhou: Beijing Institute of Technology

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

Abstract: Abstract Two-dimensional ferroelectric materials hold promises for non-volatile memory and integrated electronic circuits. However, direct synthesizing and understanding the ferroelectric mechanism of two-dimensional room-temperature ferroelectrics remains challenging. Here, we report the synthesis of intrinsic room-temperature ferroelectric CuVP2S6 via spatially confined chemical vapor deposition method, as demonstrated by second harmonic generation and piezoresponse force microscopy measurements. Importantly, we experimentally uncover the ferroelectric mechanism of CuVP2S6, which originates from the movement of Cu ions, as confirmed by scanning transmission electron microscopy. Additionally, we construct an optoelectronic CuVP2S6 synaptic device, which enables a smooth transition from optical character recognition to neural machine translation using a transformer architecture. Our study not only elucidates the ferroelectric mechanism of two-dimensional metal phosphorus sulfide compounds but also integrates optical character recognition and neural machine translation within a single material, offering significant opportunities for neuromorphic computing systems.

Date: 2025
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DOI: 10.1038/s41467-025-61508-4

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