Cited by 303Advanced Memory and Neural ComputingFerroelectric and Negative Capacitance DevicesPhase-change materials and chalcogenides

The DOI matches its Crossref record; 75 of the 75 references it cites were found in a registry or an index.

Evolution of the conductive filament system in HfO2-based memristors observed by direct atomic-scale imaging

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Abstract

The resistive switching effect in memristors typically stems from the formation and rupture of localized conductive filament paths, and HfO 2 has been accepted as one of the most promising resistive switching materials. However, the dynamic changes in the resistive switching process, including the composition and structure of conductive filaments, and especially the evolution of conductive filament surroundings, remain controversial in HfO 2-based memristors. Here, the conductive filament system in the amorphous HfO 2-based memristors with various top electrodes is revealed to be with a quasi-core-shell structure consisting of metallic hexagonal-Hf 6 O and its crystalline surroundings (monoclinic or tetragonal HfO x). The phase of the HfO x shell varies with the oxygen reservation capability of the top electrode. According to extensive high-resolution transmission electron microscopy observations and ab initio calculations, the phase transition of the conductive filament shell between monoclinic and tetragonal HfO 2 is proposed to depend on the comprehensive effects of Joule heat from the conductive filament current and the concentration of oxygen vacancies. The quasi-core-shell conductive filament system with an intrinsic barrier, which prohibits conductive filament oxidation, ensures the extreme scalability of resistive switching memristors. This study renovates the understanding of the conductive filament evolution in HfO 2-based memristors and provides potential inspirations to improve oxide memristors for nonvolatile storage-class memory applications.

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  • The estimated accuracy is comparable to other hardware-based simulation performances ranging from 70% to 94%.

    “Although our device is not ideal yet, the estimated accuracy is comparable to other hardware‐based simulation performances ranging from 70% to 94%.[ 41 , 42 , 43 , 44 , 45 ]”

    From Retention Secured Nonlinear and Self-Rectifying Analog Charge Trap Memristor for Energy-Efficient Neuromorphic Hardware (2023) · cites this paper as [43]

    The Results section on device fabrication and switching performance reports resistance ratios, retention, and switching times, not simulation accuracy. Searches for “70%,” “94%,” and hardware-based classification accuracy found no passage in our copy reporting the claimed performance range. (LLM, conf=0.76)

    Experimental — accuracy not yet measured

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Metadata

Authors
Zhang, Y., Mao, G.-Q., Zhao, X., Li, Y., Zhang, M., Wu, Z., Wu, W., Sun, H., Guo, Y., Wang, L., Zhang, X., Liu, Q., Lv, H., Xue, K.-H., Xu, G., Miao, X., Long, S., & Liu, M.
Affiliations
  • University of Science and Technology of China (CN)
  • Huazhong University of Science and Technology (CN)
  • Chinese Academy of Sciences (CN)
  • Beijing University of Technology (CN)
Corresponding author
  • Zhao, Xiaolong
  • Xue, Kan-Hao
  • Long, Shibing
  • Liu, Ming
Venue
Nature Communications
Published
2021-12-13
Volume
12
Issue
1
Pages
7232-7232
ISSN
2041-1723 (ISSN-L)
OpenAlex
W4200157328
Cited by
300
References
75
Citations by year
2026: 47 · 2025: 72 · 2024: 70 · 2023: 85 · 2022: 26
FWCI
13.31
Type
journal article
Language
en
Open access
Locations
  • Nature Communications (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
National Natural Science Foundation of China (61925110, 61821091, 51961145110)
Topics
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Advanced Memory and Neural Computing
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Ferroelectric and Negative Capacitance Devices
  • Physical Sciences › Materials Science › Materials Chemistry › Phase-change materials and chalcogenides
Keywords
conductive filaments, resistive switching, amorphous HfO2, core-shell structure, tetragonal to monoclinic phase transformation, oxygen vacancies, Joule heating, non-volatile memory

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