Synaptic devices with dynamic properties are essential for constructing a neuromorphic system. In this paper, a multiterminal in-plane-gate ionic MoS₂ transistor with dynamic synaptic characteristics is demonstrated by using poly (vinyl alcohol) as the laterally coupled proton-conducting electrolyte. The device can be regulated at a low operating voltage of 2 V due to the significant electric-double-layer effect. Typical synaptic behaviors such as excitatory postsynaptic current, inhibitory postsynaptic current, paired-pulse facilitation, and dynamic filtering are successfully mimicked. The ability of multiterminal coplanar transistor to regulate synaptic weights depending on spatial orientation is also demonstrated in this device. More importantly, orientation-dependent spike-timing-dependent plasticity learning rules can be successfully realized through this multiterminal ionic transistor. Such device may provide a promising way to construct spatiotemporally-correlated neuromorphic systems.

具有动态特性的突触装置对于构建神经形态系统至关重要。在本文中，一种多端面内栅极离子 MoS ₂通过使用聚乙烯醇作为横向耦合的质子传导电解质，证明了具有动态突触特性的晶体管。由于显着的双电层效应，该器件可以在 2 V 的低工作电压下进行调节。成功地模仿了典型的突触行为，例如兴奋性突触后电流、抑制性突触后电流、成对脉冲促进和动态过滤。该设备还展示了多端共面晶体管根据空间方向调节突触权重的能力。更重要的是，通过这种多端离子晶体管可以成功实现依赖于方向的尖峰时间依赖的可塑性学习规则。这种设备可以提供一种有前途的方法来构建时空相关的神经形态系统。