Valley-polarized quantum anomalous Hall effect in van der Waals heterostructures based on monolayer jacutingaite family materials

被引：0

作者：

Xudong Zhu

Yuqian Chen

Zheng Liu

Yulei Han

Zhenhua Qiao

机构：

[1] University of Science and Technology of China,ICQD, Hefei National Research Center for Physical Sciences at the Microscale

[2] University of Science and Technology of China,CAS Key Laboratory of Strongly

[3] Fuzhou University,Coupled Quantum Matter Physics, and Department of Physics

来源：

Frontiers of Physics | 2023年 / 18卷

关键词：

quantum anomalous Hall effect; valley polarization; topological valleytronics; transition metal dichalcogenides; jacutingaite family materials; first-principles calculations; van der Waals heterostructure;

D O I：

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学科分类号：

摘要：

We numerically study the general valley polarization and anomalous Hall effect in van der Waals (vdW) heterostructures based on monolayer jacutingaite family materials Pt2AX3 (A = Hg, Cd, Zn; X = S, Se, Te). We perform a systematic study on the atomic, electronic, and topological properties of vdW heterostructures composed of monolayer Pt2AX3 and two-dimensional ferromagnetic insulators. We show that four kinds of vdW heterostructures exhibit valley-polarized quantum anomalous Hall phase, i.e., Pt2HgS3/NiBr2, Pt2HgSe3/CoBr2, Pt2HgSe3/NiBr2, and Pt2ZnS3/CoBr2, with a maximum valley splitting of 134.2 meV in Pt2HgSe3/NiBr2 and sizable global band gap of 58.8 meV in Pt2HgS3/NiBr2. Our findings demonstrate an ideal platform to implement applications on topological valleytronics.

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