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首页> 外文期刊>Physical review, B >Tunable interlayer magnetism and band topology in van der Waals heterostructures of MnBi2Te4-family materials
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Tunable interlayer magnetism and band topology in van der Waals heterostructures of MnBi2Te4-family materials

机译：van der Waals的可调谐层间磁力和带拓扑，Mnbi2te4-家族材料的异质结构

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摘要

Manipulating interlayer magnetic coupling (IMC) of van der Waals (vdW) magnets is the key to tailoring material properties for various electronic applications and fundamental studies. Using MnBi2Te4-family materials as examples, we systematically investigate the constituent-element dependence of IMC by first-principles calculations and attribute the IMC to unusual long-range superexchange interactions mediated by the p orbitals across the vdW gap. Remarkably, a simple, universal rule is proposed to determine the sign of IMC (ferromagnetic or antiferromagnetic) by d-orbital occupation, and guidance is provided to achieve extraordinarily strong or stacking-dependent IMC by element engineering. Furthermore, several magnetic topological states are designed by heterostructuring, including ferromagnetic Weyl semimetals, high-order topological insulators, and unusual kinds of quantum anomalous Hall insulators. The findings enable us to engineer the magnetic and topological properties of MnBi2Te4-family materials as well as other vdW magnetic materials and heterostructures.
机译：操纵范德华（VDW）磁铁的滑动层磁耦合（IMC）是针对各种电子应用和基础研究剪裁材料特性的关键。使用Mnbi2te4-Family Materials作为示例，我们通过第一原理计算系统地研究了IMC的组成元素依赖性，并将IMC归因于由VDW间隙跨越VDW间隙的P轨道介导的不寻常的远程超速相互作用。值得注意的是，提出了一种简单的普遍规则，以通过D-orbital占用确定IMC（铁磁或反铁磁）的标志，并提供了通过元素工程来实现异常强或堆叠依赖性IMC的指导。此外，几种磁性拓扑态由异质结构设计，包括铁磁纤维半型，高级拓扑绝缘体，以及不寻常的量子异常霍尔绝缘子。该发现使我们能够将MnBi2Te4-家族材料以及其他VDW磁性材料和异质结构的磁性和拓扑性能设计。

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  • 来源
    《Physical review, B》 |2020年第8期|共6页
  • 作者

    Li Zhe; Li Jiaheng; He Ke; Wan Xiangang; Duan Wenhui; Xu Yong;

  • 作者单位

    Tsinghua Univ Dept Phys State Key Lab Low Dimens Quantum Phys Beijing 100084 Peoples R China;

    Tsinghua Univ Dept Phys State Key Lab Low Dimens Quantum Phys Beijing 100084 Peoples R China;

    Tsinghua Univ Dept Phys State Key Lab Low Dimens Quantum Phys Beijing 100084 Peoples R China;

    Nanjing Univ Natl Lab Solid State Microstruct Nanjing 210093 Peoples R China;

    Tsinghua Univ Dept Phys State Key Lab Low Dimens Quantum Phys Beijing 100084 Peoples R China;

    Tsinghua Univ Dept Phys State Key Lab Low Dimens Quantum Phys Beijing 100084 Peoples R China;

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  • 正文语种 eng
  • 中图分类 固体物理学;
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