论文标题
多功能二维范德华瓦尔斯（Janus Magnet Cr
Multifunctional Two-dimensional van der Waals Janus Magnet Cr-based Dichalcogenide Halides
论文作者
论文摘要
二维Van der waals Janus材料及其异质结构提供了设计引人入胜的功能的肥沃平台。在这里，通过对范德华（Van der Waals）的系统性第一原理研究Janus Monolayer CR基于CR的二甲硅烷基卤化物（Y = S，SE，TE，TE； X = Cl，Br，I），我们发现CRSX（X = Cl，Br，I）是非常令人期望的高TC Ferromagnetic seciccondotors a plane-Planemand-Planemand-Planemant-Plane-Plane-Plane-Plane-Plane-Plane-Plane-Plane-planetiation。令人兴奋的是，通过在配体S2-阴离子上的大磁矩上的好处，可以通过范德华异种结构中的磁接近效应CRSBR/BI2SER/BI2SE3/CRSBR和MOTE2/CRSBR，可以通过磁性量子量效应来实现。此外，我们表明，在外部磁场下，较大的dzyaloshinskii-moriya相互作用会引起crtex（x = cl，br，i）的天际状态。我们的工作表明，二维基于Janus Cr Cr的二甲硅烷基卤化物在拓扑电子和Valleytronic设备的应用中具有吸引力的多功能性。
Two-dimensional van der Waals Janus materials and their heterostructures offer fertile platforms for designing fascinating functionalities. Here, by means of systematic first-principles studies on van der Waals Janus monolayer Cr-based dichalcogenide halides CrYX (Y=S, Se, Te; X=Cl, Br, I), we find that CrSX (X=Cl, Br, I) are the very desirable high TC ferromagnetic semiconductors with an out-of-plane magnetization. Excitingly, by the benefit of the large magnetic moments on ligand S2- anions, the sought-after large-gap quantum anomalous Hall effect and sizable valley splitting can be achieved through the magnetic proximity effect in van der Waals heterostructures CrSBr/Bi2Se3/CrSBr and MoTe2/CrSBr, respectively. Additionally, we show that large Dzyaloshinskii-Moriya interactions give rise to skyrmion states in CrTeX (X=Cl, Br, I) under external magnetic fields. Our work reveals that two-dimensional Janus magnet Cr-based dichalcogenide halides have appealing multifunctionalities in the applications of topological electronic and valleytronic devices.
