Multifunctional two-dimensional van der Waals Janus magnet Cr-based dichalcogenide halides
Abstract 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,...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2022-05-01
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| Series: | npj Computational Materials |
| Online Access: | https://doi.org/10.1038/s41524-022-00802-x |
| _version_ | 1811258703315206144 |
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| author | Yusheng Hou Feng Xue Liang Qiu Zhe Wang Ruqian Wu |
| author_facet | Yusheng Hou Feng Xue Liang Qiu Zhe Wang Ruqian Wu |
| author_sort | Yusheng Hou |
| collection | DOAJ |
| description | Abstract 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 T C 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. |
| first_indexed | 2024-04-12T18:18:34Z |
| format | Article |
| id | doaj.art-2cdc8ffd0a5d496ab5fdf98133777a44 |
| institution | Directory Open Access Journal |
| issn | 2057-3960 |
| language | English |
| last_indexed | 2024-04-12T18:18:34Z |
| publishDate | 2022-05-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | npj Computational Materials |
| spelling | doaj.art-2cdc8ffd0a5d496ab5fdf98133777a442022-12-22T03:21:32ZengNature Portfolionpj Computational Materials2057-39602022-05-01811610.1038/s41524-022-00802-xMultifunctional two-dimensional van der Waals Janus magnet Cr-based dichalcogenide halidesYusheng Hou0Feng Xue1Liang Qiu2Zhe Wang3Ruqian Wu4Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices, Center for Neutron Science and Technology, School of Physics, Sun Yat-Sen UniversityState Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua UniversityGuangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices, Center for Neutron Science and Technology, School of Physics, Sun Yat-Sen UniversityState Key Laboratory of Surface Physics and Key Laboratory for Computational Physical Sciences (MOE) and Department of Physics, Fudan UniversityDepartment of Physics and Astronomy, University of CaliforniaAbstract 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 T C 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.https://doi.org/10.1038/s41524-022-00802-x |
| spellingShingle | Yusheng Hou Feng Xue Liang Qiu Zhe Wang Ruqian Wu Multifunctional two-dimensional van der Waals Janus magnet Cr-based dichalcogenide halides npj Computational Materials |
| title | Multifunctional two-dimensional van der Waals Janus magnet Cr-based dichalcogenide halides |
| title_full | Multifunctional two-dimensional van der Waals Janus magnet Cr-based dichalcogenide halides |
| title_fullStr | Multifunctional two-dimensional van der Waals Janus magnet Cr-based dichalcogenide halides |
| title_full_unstemmed | Multifunctional two-dimensional van der Waals Janus magnet Cr-based dichalcogenide halides |
| title_short | Multifunctional two-dimensional van der Waals Janus magnet Cr-based dichalcogenide halides |
| title_sort | multifunctional two dimensional van der waals janus magnet cr based dichalcogenide halides |
| url | https://doi.org/10.1038/s41524-022-00802-x |
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