在NiOx/HfO2−x: Al记忆电阻器中实现增强自整流的铁电极化驱动离子调制

IF 3.6 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2025-07-21 DOI:10.1063/5.0273610

Jiajing Wei, Yanfang He, Ying Yang, Huimin Zhang, Yufang Xie, Chenglin Zhang, Yuan Liu, Mingming Chen, Dawei Cao

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引用次数: 0

摘要

自整流忆阻器集成了类似二极管的行为来抑制交叉棒阵列中的潜流，有望用于高密度神经形态系统。然而，传统的设计往往遭受非线性权值更新和随机切换由于丝状或肖特基机制。在这里，我们提出了一种NiOx/HfO2−x:Al双层记忆电阻器，利用铁电极化来主动引导氧空位迁移，从而增强了自整流。极化诱导的内部场驱动氧空位迁移，并与氧离子迁移协同调节界面势垒，产生比非铁电控制装置大3.5倍的整流比。这种铁电-离子耦合也实现了高线性模拟电导更新（R2≈0.99，非线性因子α≈0.02）。我们的工作揭示了一种铁电-离子电子机制，可以实现确定性的忆阻器开关，有助于神经形态器件物理学的发展框架。

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Ferroelectric polarization-driven ionic modulation enabling enhanced self-rectification in NiOx/HfO2−x: Al memristors

Self-rectifying memristors, which integrate diode-like behavior to suppress sneak currents in crossbar arrays, are promising for high-density neuromorphic systems. However, conventional designs often suffer from nonlinear weight updates and stochastic switching due to filamentary or Schottky-based mechanisms. Here, we present a NiOx/HfO2−x:Al bilayer memristor utilizing ferroelectric polarization to actively direct oxygen vacancy migration, thereby enhancing self-rectification. The polarization-induced internal field drives oxygen vacancy migration and synergizes with oxygen ion migration to modulate the interface barrier, yielding ∼3.5× larger rectification ratio than a non-ferroelectric control device. This ferroelectric–ionic coupling also achieves highly linear analog conductance updates (R2 ≈ 0.99, nonlinearity factor α ≈ 0.02). Our work reveals a ferroelectric–ionotronic mechanism that enables deterministic memristor switching, contributing to the evolving framework of neuromorphic device physics.

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来源期刊

Applied Physics Letters 物理-物理：应用

CiteScore

6.40

自引率

10.00%

发文量

1821

审稿时长

1.6 months

期刊介绍： Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology. In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics. APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field. Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.