模拟低功率突触可塑性在一个溶液处理的基于氧化物的长保留记忆晶体管中,具有高学习精度
Rajarshi Chakraborty1, Subarna Pramanik1, Nila Pal1
1School of Materials Science and Technology, Indian Institute of Technology (Banaras Hindu University), Varanasi 221005, India.
ACS applied materials & interfaces
|September 2, 2024
概括
本研究介绍了一种使用LiNbO3和Li5AlO4.4的新型溶液加工铁电薄膜晶体管 (FeTFT). 该设备有效模拟突触可塑性,用于低功耗的神经形态计算.
科学领域:
- 材料科学 材料科学 材料科学
- 神经科学是一个神经科学.
- 电气工程 电气工程
背景情况:
- 在金属氧化物铁电薄膜晶体管中的突触可塑性探索是有限的.
- 酸 (LiNbO3) 是一种矿铁电材料,在像突触晶体管这样的神经形态设备中具有未实现的潜力.
研究的目的:
- 为神经形态应用制造和表征一种溶液处理的铁电薄膜晶体管 (FeTFT).
- 研究使用交替LiNbO3和Li5AlO4介电层来提高设备性能和减少去极化场.
主要方法:
- 使用 LiNbO3 / Li5AlO4 交替门介电器制造一种经过溶液处理的 FeTFT.
- 晶体管性能的表征,包括移动性,开/关比率和陷状态密度.
- 评估突触可塑性仿真 (短期和长期) 和人工神经网络训练精度.
主要成果:
- FeTFT表现出色的性能:和流动性为0.478cm2V-1s-1,开/关比为3.08 × 10^3,陷状态密度低,为1.3 × 10^13cm-2.
- 该设备表现出良好的记忆保留 (近1天),并成功模拟了短期和长期的突触可塑性.
- 人工神经网络模拟实现了94%的训练精度,每次突触事件的最低能量消耗约为3.09nJ.
结论:
- 开发的LiNbO3 / Li5AlO4 FeTFT显示了低功耗,高性能神经形态计算应用的重大前景.
- 独特的介电结构有效地减轻了去极化场和泄漏电流,提高了设备的稳定性和功能.
- 这项工作为使用铁电材料的先进,生物启发的计算系统铺平了道路.
相关概念视频
Long-term Potentiation
55.0K
Long-term potentiation, or LTP, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTP is the process of synaptic strengthening that occurs over time between pre- and postsynaptic neuronal connections. The synaptic strengthening of LTP works in opposition to the synaptic weakening of long-term depression (LTD) and together are the main mechanisms that underlie learning and memory.
55.0K
MOS Capacitor
733
A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
733
Long-term Depression
2.5K
Long-term depression, or LTD, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTD is the process of synaptic weakening that occurs over time between pre and postsynaptic neuronal connections. The synaptic weakening of LTD works in opposition to synaptic strengthening by long-term potentiation (LTP) and together are the main mechanisms that underlie learning and memory.
Calcium Ion Concentration Mechanism
If over...
Calcium Ion Concentration Mechanism
If over...
2.5K
Role of Neurotransmitters in Memory
485
Neurotransmitters are integral to the brain's communication system, enabling neurons to transmit signals across synapses. This chemical exchange underpins various cognitive functions, including memory processes. The role of neurotransmitters in memory is multifaceted, influencing the encoding, consolidation, and retrieval of memories through their action on different neural circuits.
Glutamate and Synaptic Plasticity
Glutamate, the brain's main excitatory neurotransmitter, is...
Glutamate and Synaptic Plasticity
Glutamate, the brain's main excitatory neurotransmitter, is...
485
MOSFET: Enhancement Mode
302
Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...
302


