范德华巡回铁磁性 Cr7Te8 中的栅极可调贝里曲率

IF 22.7 1区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Infomat Pub Date : 2024-01-16 DOI:10.1002/inf2.12524
Kui Meng, Zeya Li, Zhansheng Gao, Xiangyu Bi, Peng Chen, Feng Qin, Caiyu Qiu, Lingyun Xu, Junwei Huang, Jinxiong Wu, Feng Luo, Hongtao Yuan
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引用次数: 0

摘要

反常霍尔效应(AHE)与动量空间中占位电子态的贝里曲率有关,是凝聚态物理学中引人入胜的方面之一,并为拓扑电子学的潜在应用提供了另一种选择。之前的实验报告了基于应变工程或化学掺杂的可调贝里曲率以及由此产生的 AHE 磁化切换过程。然而,这些策略对 AHE 的调制通常是不可逆的,因此很难实现对 AHE 的可切换控制以及由此产生的自旋电子应用。在这里,我们展示了通过在具有出色环境稳定性的巡回铁磁性 Cr7Te8 中进行电门控,实现贝里曲率相关 AHE 的可切换控制。AHE的门控可调符号反转可归因于插层引起的费米级变化导致的Cr7Te8带状结构中贝里曲率的重新分布。我们的工作促进了基于门控可调贝里曲率的磁开关器件的应用。
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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Gate-tunable Berry curvature in van der Waals itinerant ferromagnetic Cr7Te8

The anomalous Hall effect (AHE) that associated with the Berry curvature of occupied electronic states in momentum-space is one of the intriguing aspects in condensed matter physics, and provides an alternative for potential applications in topological electronics. Previous experiments reported the tunable Berry curvature and the resulting magnetization switching process in the AHE based on strain engineering or chemical doping. However, the AHE modulation by these strategies are usually irreversible, making it difficult to realize switchable control of the AHE and the resultant spintronic applications. Here, we demonstrated the switchable control of the Berry-curvature-related AHE by electrical gating in itinerant ferromagnetic Cr7Te8 with excellent ambient stability. The gate-tunable sign reversal of the AHE can be attributed to the redistribution of the Berry curvature in the band structure of Cr7Te8 due to the intercalation-induced change in the Fermi level. Our work facilitates the applications of magnetic switchable devices based on gate-tunable Berry curvature.

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来源期刊
Infomat
Infomat MATERIALS SCIENCE, MULTIDISCIPLINARY-
CiteScore
37.70
自引率
3.10%
发文量
111
审稿时长
8 weeks
期刊介绍: InfoMat, an interdisciplinary and open-access journal, caters to the growing scientific interest in novel materials with unique electrical, optical, and magnetic properties, focusing on their applications in the rapid advancement of information technology. The journal serves as a high-quality platform for researchers across diverse scientific areas to share their findings, critical opinions, and foster collaboration between the materials science and information technology communities.
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