Giant Nonvolatile Multistate Resistance with Fully Magnetically Controlled van der Waals Multiferroic Tunnel Junctions

IF 9.1 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2025-05-15 DOI:10.1021/acs.nanolett.5c0044010.1021/acs.nanolett.5c00440

Zhi Yan*, Xujin Zhang, Jianhua Xiao, Cheng Fang and Xiaohong Xu*,

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Abstract

Ferroelectric polarization switching in electrically controlled van der Waals multiferroic tunnel junctions (vdW-MFTJs) causes atomic migration, compromising device stability and fatigue resistance. Here, we propose fully magnetically controlled vdW-MFTJs based on a CrBr₃/MnPSe₃/CrBr₃ vertical heterostructure, achieving ferroelectric polarization reversal without atomic migration. First-principles calculations reveal that integrating PtTe₂/alkali-metal (Li/Na/K)-doped/intercalated CrBr₃ electrodes enables exceptional performance, with a maximum tunneling magnetoresistance (TMR) of 8.1 × 10⁵% and tunneling electroresistance (TER) of 2499%. Applying an external bias voltage enhances the TMR to 3.6 × 10⁷% and the TER to 9990%. A pronounced negative differential resistance (NDR) effect is observed with a record peak-to-valley ratio (PVR) of 9.55 × 10⁹% for vertical tunnel junctions. The spin-filtering channels are flexibly controlled by the magnetization direction of the magnetic free layer, achieving perfect spin-filtering over a broad bias range. This work paves the way for the experimental exploration of fully magnetically controlled vdW-MFTJs.

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具有完全磁控范德华多铁隧道结的巨非易失多态电阻

在电控范德华多铁隧道结（vdW-MFTJs）中，铁电极化开关会导致原子迁移，影响器件的稳定性和抗疲劳性。在这里，我们提出了基于CrBr3/MnPSe3/CrBr3垂直异质结构的全磁控vdW-MFTJs，实现了铁电极化反转而没有原子迁移。第一性原理计算表明，集成PtTe2/碱金属（Li/Na/K）掺杂/嵌入的CrBr3电极具有优异的性能，最大隧道磁电阻（TMR）为8.1 × 105%，隧道电电阻（TER）为2499%。施加外部偏置电压将TMR提高到3.6 × 107%， TER提高到9990%。垂直隧道结的负差分电阻（NDR）效应显著，峰谷比（PVR）达到创纪录的9.55 × 109%。自旋滤波通道可通过磁性自由层的磁化方向灵活控制，在宽偏置范围内实现完美的自旋滤波。这项工作为全磁控vdw - mftj的实验探索铺平了道路。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.