Reconfigurable dielectric engineered WSe2/HZO mem-transistor

Hybrid systems coupling two-dimensional (2D) semiconductors with functional ferroelectrics are attracting increasing attention owing to their excellent electronic/optoelectronic properties and new functionalities through the multiple heterointerface interactions. In our device architecture, interfac...

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Main Authors: Tong, Tong, He, Yongli, Gao, Yuan, Liu, Yukang, Liao, Kan, Li, Weisheng
Other Authors: School of Materials Science and Engineering
Format: Article
Language:English
Published: 2024
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Online Access:https://hdl.handle.net/10356/180774
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Institution: Nanyang Technological University
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spelling sg-ntu-dr.10356-1807742024-10-25T15:47:21Z Reconfigurable dielectric engineered WSe2/HZO mem-transistor Tong, Tong He, Yongli Gao, Yuan Liu, Yukang Liao, Kan Li, Weisheng School of Materials Science and Engineering Engineering Linear conductance update Reliable memory properties Hybrid systems coupling two-dimensional (2D) semiconductors with functional ferroelectrics are attracting increasing attention owing to their excellent electronic/optoelectronic properties and new functionalities through the multiple heterointerface interactions. In our device architecture, interfacial states are introduced on the ferroelectric Hf0.5Zr0.5O2 thin film as a gate dielectric layer for the charge trapping effect. Utilizing the collaborative effects of charge trapping and ferroelectric polarization behavior, a multifunctional 2D WSe2/HZO memtransistor is demonstrated with an ultra-low off-state (dark) current of 10−13 A, high on/off ratio of 106 and linear conductance update. This device exhibits reliable memory properties and tunable synaptic functions including short-term plasticity/long-term plasticity, paired pulse facilitation, spike-timing dependent plasticity, synaptic potentiation/depression, and filtering in a single device. Extensive endurance tests ensure robust stability (1000 switching cycles, 2000 s holding time) and the synaptic weight update in the device exhibits excellent linearity. Based on the experimental data, our devices eventually achieve an accuracy of 94.8% in artificial neural network simulations. These results highlight a new approach for constructing hybrid systems coupling 2D semiconductors with functional ferroelectrics in a single device to tune synaptic weight, optimize circuit design, and build artificial neuromorphic computing systems. Published version This work was supported by The National Key R&D Program of China (2022YFA1402500), the National Natural Science Foundation of China (62304101), the Jiangsu Province Key R&D Program (BE2023009-3), the Natural Science Foundation of Jiangsu Province (BK20230776) and Xiaomi Foundation. The authors would also like to express their sincere gratitude to the Interdisciplinary Research Center for Future Intelligent Chips (Chip-X) funded by the Yachen Foundation for their invaluable support. 2024-10-23T07:50:55Z 2024-10-23T07:50:55Z 2024 Journal Article Tong, T., He, Y., Gao, Y., Liu, Y., Liao, K. & Li, W. (2024). Reconfigurable dielectric engineered WSe2/HZO mem-transistor. 2D Materials, 11(4), 045012-. https://dx.doi.org/10.1088/2053-1583/ad70c9 2053-1583 https://hdl.handle.net/10356/180774 10.1088/2053-1583/ad70c9 2-s2.0-85203000183 4 11 045012 en 2D Materials © 2024 The Author(s). Published by IOP Publishing Ltd. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering
Linear conductance update
Reliable memory properties
spellingShingle Engineering
Linear conductance update
Reliable memory properties
Tong, Tong
He, Yongli
Gao, Yuan
Liu, Yukang
Liao, Kan
Li, Weisheng
Reconfigurable dielectric engineered WSe2/HZO mem-transistor
description Hybrid systems coupling two-dimensional (2D) semiconductors with functional ferroelectrics are attracting increasing attention owing to their excellent electronic/optoelectronic properties and new functionalities through the multiple heterointerface interactions. In our device architecture, interfacial states are introduced on the ferroelectric Hf0.5Zr0.5O2 thin film as a gate dielectric layer for the charge trapping effect. Utilizing the collaborative effects of charge trapping and ferroelectric polarization behavior, a multifunctional 2D WSe2/HZO memtransistor is demonstrated with an ultra-low off-state (dark) current of 10−13 A, high on/off ratio of 106 and linear conductance update. This device exhibits reliable memory properties and tunable synaptic functions including short-term plasticity/long-term plasticity, paired pulse facilitation, spike-timing dependent plasticity, synaptic potentiation/depression, and filtering in a single device. Extensive endurance tests ensure robust stability (1000 switching cycles, 2000 s holding time) and the synaptic weight update in the device exhibits excellent linearity. Based on the experimental data, our devices eventually achieve an accuracy of 94.8% in artificial neural network simulations. These results highlight a new approach for constructing hybrid systems coupling 2D semiconductors with functional ferroelectrics in a single device to tune synaptic weight, optimize circuit design, and build artificial neuromorphic computing systems.
author2 School of Materials Science and Engineering
author_facet School of Materials Science and Engineering
Tong, Tong
He, Yongli
Gao, Yuan
Liu, Yukang
Liao, Kan
Li, Weisheng
format Article
author Tong, Tong
He, Yongli
Gao, Yuan
Liu, Yukang
Liao, Kan
Li, Weisheng
author_sort Tong, Tong
title Reconfigurable dielectric engineered WSe2/HZO mem-transistor
title_short Reconfigurable dielectric engineered WSe2/HZO mem-transistor
title_full Reconfigurable dielectric engineered WSe2/HZO mem-transistor
title_fullStr Reconfigurable dielectric engineered WSe2/HZO mem-transistor
title_full_unstemmed Reconfigurable dielectric engineered WSe2/HZO mem-transistor
title_sort reconfigurable dielectric engineered wse2/hzo mem-transistor
publishDate 2024
url https://hdl.handle.net/10356/180774
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