Symmetric n/p Schottky Barrier Modulation for Precision-Configurable Neural Network

IF 9.1 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2025-06-01 DOI:10.1021/acs.nanolett.5c01409

Miao Zhang, Moufu Kong, Yi Cui, Hongfei Deng, Mingyang Wang, Zhikai Le, Yang Wang, Xinrui Chen, Haoxiang Tian, Kehan Wu, Xianfu Wang, Ao Liu, Yanrong Li

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Abstract

Achieving both high precision and efficiency in edge devices presents a notable challenge in neuromorphic computing. Conventional neuristors typically operate with fixed computational precision, forcing a trade-off between accuracy and efficiency when addressing tasks of varying complexity. To overcome this limitation, we propose a Schottky barrier neuristor that combines high-efficiency nonlinear logic with high-precision linear operations within a single device. A distinctive global bottom gate modulates the Schottky barrier, maintaining a linear relationship between gate voltage and transconductance. Furthermore, electrostatic doping-induced image force effects, alongside an optimized source-drain work function, enable uniform and symmetric n-/p-type modulation, enhancing the driving capability. This innovative design supports the development of reconfigurable digital-analogue units, requiring only one-fifth the number of devices needed for nonlinear functions compared to silicon. Simulations demonstrate that an accelerator based on this device achieves 98.3% accuracy and an energy efficiency of 1359.62 TOPS/W.

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精确可配置神经网络的对称n/p肖特基势垒调制

在边缘设备中实现高精度和高效率是神经形态计算的一个显著挑战。传统的神经电阻器通常以固定的计算精度运行，在处理不同复杂性的任务时，必须在精度和效率之间进行权衡。为了克服这一限制，我们提出了一种肖特基势垒神经电阻器，它在单个器件内结合了高效率的非线性逻辑和高精度的线性运算。一个独特的全局底栅极调制肖特基势垒，保持栅极电压和跨导之间的线性关系。此外，静电掺杂引起的像力效应，加上优化的源漏功函数，使均匀对称的n /p型调制成为可能，增强了驱动能力。这种创新的设计支持可重构数字模拟单元的开发，与硅相比，非线性功能所需的设备数量仅为其数量的五分之一。仿真结果表明，基于该装置的加速器精度达到98.3%，能量效率达到1359.62 TOPS/W。

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来源期刊

Nano Letters 工程技术-材料科学：综合

CiteScore

16.80

自引率

2.80%

发文量

1182

审稿时长

1.4 months

期刊介绍： Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including: - Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale - Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies - Modeling and simulation of synthetic, assembly, and interaction processes - Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance - Applications of nanoscale materials in living and environmental systems Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.