Subattojoule Electrical Switching in a Two-Dimensional TaSe2 Oxide Device with High Endurance

IF 9.6 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2025-01-30 DOI:10.1021/acs.nanolett.4c05242

Jiahao Shen, Feiyu Tang, Changying Xiong, Xianliang Mai, Huan Wang, Xiao Luo, Qundao Xu, Meng Xu, Yi Li, Kan-Hao Xue, Ming Xu, Zhongrui Wang, Xiangshui Miao

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Abstract

Recent developments in artificial intelligence and the internet-of-things have created great demand for low-power microelectronic devices. Two-dimensional (2D) electrical switching materials are extensively used in neuromorphic computing technology, yet their high leakage current and low endurance impede their further application. This study presents a vertical crossbar-structured conductive-bridge threshold switching device based on 2D TaSe₂ oxide. Utilizing natural oxidation under air to generate a TaSeO functional layer, this device demonstrates stable electrical switching behavior with a low operating voltage (<0.8 V) and a steep turn-on slope (<9.4 mV decade^–1). Notably, the device demonstrates exceptionally subattojoule energy consumption (0.142 aJ) and remarkable durability (>10⁸). This breakthrough tackles the endurance issues prevalent in 2D devices and holds promising implications for neuromorphic computing. The fundamental switching process, as supported by transmission electron microscopy, hinges on the role of Ag₂Se nanocrystalline islands in promoting the growth of conductive filaments, enhancing device performance and endurance.

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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.