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1.中国科学院大学集成电路学院,北京 100049
2.中国科学院微电子研究所,北京 100029
Received:02 March 2025,
Accepted:13 March 2025,
Published Online:08 April 2025,
Published:25 May 2025
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胡辰,彭松昂.α-In2Se3铁电沟道场效应晶体管及其突触性能[J].中山大学学报(自然科学版)(中英文),2025,64(03):103-108.
HU Chen,PENG Songang.Two-dimensional ferroelectric α-In2Se3 channel transistors and their synaptic properties[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2025,64(03):103-108.
胡辰,彭松昂.α-In2Se3铁电沟道场效应晶体管及其突触性能[J].中山大学学报(自然科学版)(中英文),2025,64(03):103-108. DOI: 10.13471/j.cnki.acta.snus.ZR20250041.
HU Chen,PENG Songang.Two-dimensional ferroelectric α-In2Se3 channel transistors and their synaptic properties[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2025,64(03):103-108. DOI: 10.13471/j.cnki.acta.snus.ZR20250041.
利用机械剥离法制备α-In
2
Se
3
二维铁电材料,通过原子力显微镜分析样品的结构特征,并通过电子束光刻制备以α-In
2
Se
3
作为沟道的铁电沟道场效应晶体管。研究发现:通过在顶栅电极施加正负脉冲可以有效激励α-In
2
Se
3
面外极化,表现出增强和抑制的短程可塑性。并且,随着栅极电压脉冲积累,α-In
2
Se
3
面外极化特性会使得沟道铁电极化加强,对应的突触电流也会随之增加,从而实现由短程可塑性向长程可塑性的转变。此外,不同脉幅的激励信号可以调整长时程增强特性,展现了器件应用于复杂突触学习行为的可行性。
Two-dimensional ferroelectric α-In
2
Se
3
was fabricated using the mechanical exfoliation method, and the structural characteristics of the samples were analyzed by atomic force microscopy (AFM). Ferroelectric channel transistors with α-In
2
Se
3
as the channel were prepared by electron beam lithography. This work reveals that the out-of-plane polarization of α-In
2
Se
3
can be effectively modulated by applying electrical pulses to the top-gate electrode, enabling the short-term plasticity (STP) through synaptic potentiation and depression. Significantly, cumulative gate voltage pulses amplify the ferroelectric polarization in the channel via domain alignment dynamics, resulting in a progr
essive enhancement of synaptic current, which facilitates transition from STP to long-term plasticity(LTP). Furthermore, the tunable LTP characteristics modified by pulse amplitude engineering demonstrate the capability of α-In
2
Se
3
device to emulate complex synaptic learning rules.
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