GdN thin film: Chern insulating state on square lattice
Using first-principles calculations, we predict a Chern insulating phase in thin films of the ferromagnetic semimetal GdN. In contrast to previously proposed Chern insulator candidates, which mostly rely on honeycomb lattices, this system affords a great chance to realize the quantum anomalous Hall...
| Main Authors: | , , , , , , , , |
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| Format: | Journal Article |
| Language: | English |
| Published: |
2016
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| Online Access: | https://hdl.handle.net/10356/81734 http://hdl.handle.net/10220/39647 |
| _version_ | 1811677148406087680 |
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| author | Li, Zhi Kim, Jinwoong Kioussis, Nicholas Ning, Shu-Yu Su, Haibin Iitaka, Toshiaki Tohyama, Takami Yang, Xinyu Zhang, Jiu-Xing |
| author2 | School of Materials Science & Engineering |
| author_facet | School of Materials Science & Engineering Li, Zhi Kim, Jinwoong Kioussis, Nicholas Ning, Shu-Yu Su, Haibin Iitaka, Toshiaki Tohyama, Takami Yang, Xinyu Zhang, Jiu-Xing |
| author_sort | Li, Zhi |
| collection | NTU |
| description | Using first-principles calculations, we predict a Chern insulating phase in thin films of the ferromagnetic semimetal GdN. In contrast to previously proposed Chern insulator candidates, which mostly rely on honeycomb lattices, this system affords a great chance to realize the quantum anomalous Hall effect on a square lattice without either a magnetic substrate or transition metal doping, making synthesis easier. The band inversion between the 5d orbitals of Gd and 2p orbitals of N is verified by first-principles calculations based on density functional theory, and the band gap can be as large as 100 meV within the GdN trilayer. With a further increase of film thickness, the band gap tends to close and the metallic bulk property becomes obvious. |
| first_indexed | 2024-10-01T02:32:46Z |
| format | Journal Article |
| id | ntu-10356/81734 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:32:46Z |
| publishDate | 2016 |
| record_format | dspace |
| spelling | ntu-10356/817342020-09-26T21:54:41Z GdN thin film: Chern insulating state on square lattice Li, Zhi Kim, Jinwoong Kioussis, Nicholas Ning, Shu-Yu Su, Haibin Iitaka, Toshiaki Tohyama, Takami Yang, Xinyu Zhang, Jiu-Xing School of Materials Science & Engineering Institute of Advanced Studies Materials Science and Engineering Using first-principles calculations, we predict a Chern insulating phase in thin films of the ferromagnetic semimetal GdN. In contrast to previously proposed Chern insulator candidates, which mostly rely on honeycomb lattices, this system affords a great chance to realize the quantum anomalous Hall effect on a square lattice without either a magnetic substrate or transition metal doping, making synthesis easier. The band inversion between the 5d orbitals of Gd and 2p orbitals of N is verified by first-principles calculations based on density functional theory, and the band gap can be as large as 100 meV within the GdN trilayer. With a further increase of film thickness, the band gap tends to close and the metallic bulk property becomes obvious. Published version 2016-01-11T03:55:38Z 2019-12-06T14:39:25Z 2016-01-11T03:55:38Z 2019-12-06T14:39:25Z 2015 Journal Article Li, Z., Kim, J., Kioussis, N., Ning, S.-Y., Su, H., Iitaka, T., et al. (2015). GdN thin film: Chern insulating state on square lattice. Physical Review B, 92, 201303-. 1098-0121 https://hdl.handle.net/10356/81734 http://hdl.handle.net/10220/39647 10.1103/PhysRevB.92.201303 en Physical Review B © 2015 American Physical Society. This paper was published in Physical Review B and is made available as an electronic reprint (preprint) with permission of American Physical Society. The published version is available at: [http://dx.doi.org/10.1103/PhysRevB.92.201303]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. 5 p. application/pdf |
| spellingShingle | Materials Science and Engineering Li, Zhi Kim, Jinwoong Kioussis, Nicholas Ning, Shu-Yu Su, Haibin Iitaka, Toshiaki Tohyama, Takami Yang, Xinyu Zhang, Jiu-Xing GdN thin film: Chern insulating state on square lattice |
| title | GdN thin film: Chern insulating state on square lattice |
| title_full | GdN thin film: Chern insulating state on square lattice |
| title_fullStr | GdN thin film: Chern insulating state on square lattice |
| title_full_unstemmed | GdN thin film: Chern insulating state on square lattice |
| title_short | GdN thin film: Chern insulating state on square lattice |
| title_sort | gdn thin film chern insulating state on square lattice |
| topic | Materials Science and Engineering |
| url | https://hdl.handle.net/10356/81734 http://hdl.handle.net/10220/39647 |
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