The quantum anomalous Hall effect in two-dimensional hexagonal monolayers studied by first-principles calculations.

IF 4.6 2区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES iScience Pub Date : 2024-12-18 eCollection Date: 2025-01-17 DOI:10.1016/j.isci.2024.111622

Lixin Zhang, Hongxin Chen, Junfeng Ren, Xiaobo Yuan

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Abstract

The quantum anomalous Hall effect (QAHE) demonstrates the potential for achieving quantized Hall resistance without the need for an external magnetic field, making it highly promising for reducing energy loss in electronic devices. Its realization and research rely heavily on precise first-principles calculations, which are essential for analyzing the electronic structures and topological properties of novel two-dimensional (2D) materials. This review article explores the theoretical progress of QAHE in 2D hexagonal monolayers with strong spin-orbit coupling and internal magnetic ordering. We summarize current strategies and methods for realizing QAHE in these monolayers, focusing on material selection and fine-tuning to achieve stable QAHE at room temperature. We hope that this review will provide new perspectives for theoretical studies and enable researchers to more accurately predict materials with superior QAHE properties. Meanwhile, we anticipate that these theoretical advancements will further drive breakthroughs in experimental studies and promote its broader application in low-power electronic devices and quantum information technology.

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用第一性原理计算研究二维六方单层中的量子反常霍尔效应。

量子反常霍尔效应（QAHE）证明了在不需要外部磁场的情况下实现量子化霍尔电阻的潜力，使其在减少电子设备的能量损失方面具有很大的前景。它的实现和研究在很大程度上依赖于精确的第一性原理计算，这对于分析新型二维（2D）材料的电子结构和拓扑性质至关重要。本文综述了具有强自旋-轨道耦合和内部磁有序的二维六方单分子层中QAHE的理论进展。我们总结了目前在这些单层中实现QAHE的策略和方法，重点是材料的选择和微调，以实现室温下稳定的QAHE。我们希望这一综述能够为理论研究提供新的视角，使研究人员能够更准确地预测具有优异QAHE性能的材料。同时，我们预计这些理论进展将进一步推动实验研究的突破，并促进其在低功耗电子器件和量子信息技术中的更广泛应用。

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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来源期刊

iScience Multidisciplinary-Multidisciplinary

CiteScore

7.20

自引率

1.70%

发文量

1972

审稿时长

6 weeks

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