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密度泛函理论对钙钛矿型RCoO纳米纤维中传导机制的见解，用于未来的电阻式随机存取存储器应用。

Density Functional Theory Insights into Conduction Mechanisms in Perovskite-Type RCoO Nanofibers for Future Resistive Random-Access Memory Applications.

作者信息

Hu Quanli, Luo Hanqiong, Song Chao, Wang Yin, Yue Bin, Liu Jinghai

机构信息

Inner Mongolia Key Lab of Solid State Chemistry for Battery, Inner Mongolia Engineering Research Center of Lithium-Sulfur Battery Energy Storage, College of Chemistry and Materials Science, Inner Mongolia Minzu University, Tongliao 028000, China.

Department of Chemistry, Tonghua Normal University, Tonghua 134002, China.

出版信息

Molecules. 2024 Dec 23;29(24):6056. doi: 10.3390/molecules29246056.

DOI:10.3390/molecules29246056

PMID:39770145

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11677331/

Abstract

In the era of artificial intelligence and Internet of Things, data storage has an important impact on the future development direction of data analysis. Resistive random-access memory (RRAM) devices are the research hotspot in the era of artificial intelligence and Internet of Things. Perovskite-type rare-earth metal oxides are common functional materials and considered promising candidates for RRAM devices because their interesting electronic properties depend on the interaction between oxygen ions, transition metals, and rare-earth metals. LaCoO, NdCoO, and SmCoO are typical rare-earth cobaltates (RCoO). These perovskite materials were fabricated by electrospinning and the calcination method. The aim of this study was to investigate the resistive switching effect in the RCoO structure. The oxygen vacancies in RCoO are helpful to form conductive filaments, which dominates the resistance transition mechanism of Pt/RCoO/Pt. The electronic properties of RCoO were investigated, including the barrier height and the shape of the conductive filaments. This study confirmed the potential application of LaCoO, NdCoO, and SmCoO in memory storage devices.

摘要

在人工智能和物联网时代，数据存储对数据分析的未来发展方向有着重要影响。电阻式随机存取存储器（RRAM）器件是人工智能和物联网时代的研究热点。钙钛矿型稀土金属氧化物是常见的功能材料，被认为是RRAM器件的有前途的候选材料，因为它们有趣的电子特性取决于氧离子、过渡金属和稀土金属之间的相互作用。LaCoO、NdCoO和SmCoO是典型的稀土钴酸盐（RCoO）。这些钙钛矿材料通过静电纺丝和煅烧方法制备。本研究的目的是研究RCoO结构中的电阻开关效应。RCoO中的氧空位有助于形成导电细丝，这主导了Pt/RCoO/Pt的电阻转变机制。研究了RCoO的电子特性，包括势垒高度和导电细丝的形状。本研究证实了LaCoO、NdCoO和SmCoO在存储器存储器件中的潜在应用。