Quasi-Volatile MoS 2 Barristor Memory for 1T Compact Neuron by Correlative Charges Trapping and Schottky Barrier Modulation.
Jiali HuoHuaxiang YinYadong ZhangXiaosi TanYunwei MaoChuan ZhangFan ZhangGuohui ZhanZhaohao ZhangQingzhu ZhangGaobo XuZhen-Hua WuPublished in: ACS applied materials & interfaces (2022)
Artificial neurons as the basic units of spiking neural network (SNN) have attracted increasing interest in energy-efficient neuromorphic computing. 2D transition metal dichalcogenide (TMD)-based devices have great potential for high-performance and low-power artificial neural devices, owing to their unique ion motion, interface engineering, and resistive switching behaviors. Although there are widespread applications of TMD-based artificial synapses in neural networks, TMD-based neurons are seldom reported due to the lack of bio-plausible multi-mechanisms to mimic leaking, integrating, and firing biological behaviors without external assistance. In this work, for the first time, a methodology is developed by introducing the hybrid effect of charge trapping (CT) and Schottky barrier (SB) in MoS 2 FETs for barristor memory and one-transistor (1T) compact artificial neuron realization. By correlating the CT and SB processes, quasi-volatile and resistive switching behaviors are realized on the fabricated MoS 2 FET and utilized to mimic the accumulating, leaking, and firing biological behaviors of neurons. Therefore, based on a single quasi-volatile CT-SB MoS 2 barristor memory, a 1T compact neuron of the basic leaky-integral-and-fire (LIF) function is demonstrated without a peripheral circuit. Furthermore, a spiking neural network (SNN) based on the CT-SB MoS 2 barristor neurons is simulated and implemented in pattern classification with high accuracy approaching 95.82%. This work provides a highly integrated and inherently low-energy implementation for neural networks.
Keyphrases
- neural network
- transition metal
- quantum dots
- image quality
- dual energy
- computed tomography
- contrast enhanced
- room temperature
- spinal cord
- reduced graphene oxide
- working memory
- primary care
- positron emission tomography
- visible light
- magnetic resonance imaging
- highly efficient
- gas chromatography
- machine learning
- deep learning
- solid state
- magnetic resonance
- low cost
- electron microscopy