{"title":"Quantum Anomalous Hall States in Li/Na-Doped Kagome V3X8 (X = Cl, Br) Monolayers","authors":"Huijie Lian, Xiaokang Xu, Jinlian Lu, Xiaojing Yao, Ailei He, Xiuyun Zhang","doi":"10.1016/j.jallcom.2025.179103","DOIUrl":null,"url":null,"abstract":"The quantum anomalous Hall (QAH) insulators have great potential in low-energy electronic devices due to their dissipationless conducting channels. By carrying first-principles calculations, we predict that Li/Na-doped two-dimensional kagome lattice V<sub>3</sub>X<sub>8</sub> (X = Cl, Br) monolayers, V<sub>3</sub>X<sub>8</sub>@Li(Na), are intrinsically ferromagnetic (FM) half-semimetals with out-of-plane magnetic anisotropy. Interestingly, the V<sub>3</sub>X<sub>8</sub>@Li(Na) monolayers exhibit QAH effect with Chern number of C = 1, and a topological phase transition from C = 1 to C = -1 occurs when rotating the magnetization direction from <em>z</em> axis to -<em>z</em> axis. Moreover, the magnetic and topological properties of V<sub>3</sub>X<sub>8</sub>@Li(Na) monolayers can be further modulated by biaxial strains, and FM QAH insulator and antiferromagnetic (AFM) semiconductor transition can be emerged. Our work provides that V<sub>3</sub>X<sub>8</sub>@Li(Na) monolayers can serve as materials for exploring novel QAH physics.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"43 1","pages":""},"PeriodicalIF":5.8000,"publicationDate":"2025-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Alloys and Compounds","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1016/j.jallcom.2025.179103","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
The quantum anomalous Hall (QAH) insulators have great potential in low-energy electronic devices due to their dissipationless conducting channels. By carrying first-principles calculations, we predict that Li/Na-doped two-dimensional kagome lattice V3X8 (X = Cl, Br) monolayers, V3X8@Li(Na), are intrinsically ferromagnetic (FM) half-semimetals with out-of-plane magnetic anisotropy. Interestingly, the V3X8@Li(Na) monolayers exhibit QAH effect with Chern number of C = 1, and a topological phase transition from C = 1 to C = -1 occurs when rotating the magnetization direction from z axis to -z axis. Moreover, the magnetic and topological properties of V3X8@Li(Na) monolayers can be further modulated by biaxial strains, and FM QAH insulator and antiferromagnetic (AFM) semiconductor transition can be emerged. Our work provides that V3X8@Li(Na) monolayers can serve as materials for exploring novel QAH physics.
期刊介绍:
The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.