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Ovonic threshold switching-based artificial afferent neurons for thermal in-sensor computing.

Kai Li1, Jiaping Yao1, Peng Zhao1

  • 1School of Integrated Circuits, Hubei Key Laboratory for Advanced Memories, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China. xmcheng@hust.edu.cn.

Materials Horizons
|March 28, 2024
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This summary is machine-generated.

Researchers developed a novel artificial thermal afferent neuron using a nitrogen-doped silicon telluride ovonic threshold switching (OTS) device. This innovation significantly reduces power consumption for advanced sensory systems.

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Area of Science:

  • Materials Science and Engineering
  • Neuroscience and Neuromorphic Computing
  • Device Physics

Background:

  • Artificial afferent neurons mimic biological sensory systems for environmental perception.
  • Existing artificial neurons face challenges with high power consumption and scalability.
  • Need for efficient and compact artificial sensory systems in robotics and electronics.

Purpose of the Study:

  • To develop a bioinspired artificial thermal afferent neuron with reduced power consumption.
  • To address the limitations of current artificial neuron technologies.
  • To explore the potential of ovonic threshold switching (OTS) devices for neuromorphic applications.

Main Methods:

  • Fabrication of a novel nitrogen-doped silicon telluride (N-doped SiTe) ovonic threshold switching (OTS) device.
  • Characterization of the OTS device's uniformity, endurance, and leakage current.
  • Construction and testing of an artificial thermal afferent neuron utilizing the engineered OTS device.

Main Results:

  • The N-doped SiTe OTS device demonstrated high uniformity and robust endurance.
  • Nitrogen doping significantly reduced leakage current, achieving ultra-low power consumption (<0.3 nJ/spike).
  • The device exhibited inherent temperature response, enabling a compact artificial thermal afferent neuron.

Conclusions:

  • The N-doped SiTe OTS device offers a promising solution for low-power artificial afferent neurons.
  • This technology enables the development of highly compact and efficient artificial thermal sensory systems.
  • The findings have implications for advancing electronic skin and sensory neurorobotics.