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<p>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 CuVP<sub>2</sub>S<sub>6</sub> 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 CuVP<sub>2</sub>S<sub>6</sub>, which originates from the movement of Cu ions, as confirmed by scanning transmission electron microscopy. Additionally, we construct an optoelectronic CuVP<sub>2</sub>S<sub>6</sub> 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.</p>

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Intrinsic ferroelectric CuVP2S6 for potential applications in neuromorphic recognition and translation

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年7月7日

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  • 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,
  • Jiadong Zhou

摘要

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.