Confinement effect enhanced Stoner ferromagnetic instability in monolayer 1T-VSe2
Monolayer 1T-VSe _2 has been reported as a room-temperature ferromagnet. In this work, by using the first-principles calculations, we unveil that the ferromagnetism in monolayer 1T-VSe _2 is originated from its intrinsic huge Stoner instability enhanced by the confinement effect, which can eliminate...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2021-01-01
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| Series: | New Journal of Physics |
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| Online Access: | https://doi.org/10.1088/1367-2630/abdfef |
| _version_ | 1827872898205876224 |
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| author | Junyi He Qing Xie Gang Xu |
| author_facet | Junyi He Qing Xie Gang Xu |
| author_sort | Junyi He |
| collection | DOAJ |
| description | Monolayer 1T-VSe _2 has been reported as a room-temperature ferromagnet. In this work, by using the first-principles calculations, we unveil that the ferromagnetism in monolayer 1T-VSe _2 is originated from its intrinsic huge Stoner instability enhanced by the confinement effect, which can eliminate the interlayer coupling, and lead to a drastic increase of the density of states at the Fermi level due to the presence of Van Hove singularity. Our calculations also demonstrate that the Stoner instability is very sensitive to the interlayer distance. These results provide a useful route to modulate the nonmagnetic to ferromagnetic transition in few-layers or bulk 1T-VSe _2 , which also shed light on the enhancement of its Curie temperature by enlarging the interlayer distance. |
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| format | Article |
| id | doaj.art-fd1691b308d24e42943384c3a03e23a4 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:30:03Z |
| publishDate | 2021-01-01 |
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| series | New Journal of Physics |
| spelling | doaj.art-fd1691b308d24e42943384c3a03e23a42023-08-08T15:32:51ZengIOP PublishingNew Journal of Physics1367-26302021-01-0123202302710.1088/1367-2630/abdfefConfinement effect enhanced Stoner ferromagnetic instability in monolayer 1T-VSe2Junyi He0Qing Xie1Gang Xu2Wuhan National High Magnetic Field Center and School of Physics, Huazhong University of Science and Technology , Wuhan 430074, People’s Republic of ChinaWuhan National High Magnetic Field Center and School of Physics, Huazhong University of Science and Technology , Wuhan 430074, People’s Republic of ChinaWuhan National High Magnetic Field Center and School of Physics, Huazhong University of Science and Technology , Wuhan 430074, People’s Republic of ChinaMonolayer 1T-VSe _2 has been reported as a room-temperature ferromagnet. In this work, by using the first-principles calculations, we unveil that the ferromagnetism in monolayer 1T-VSe _2 is originated from its intrinsic huge Stoner instability enhanced by the confinement effect, which can eliminate the interlayer coupling, and lead to a drastic increase of the density of states at the Fermi level due to the presence of Van Hove singularity. Our calculations also demonstrate that the Stoner instability is very sensitive to the interlayer distance. These results provide a useful route to modulate the nonmagnetic to ferromagnetic transition in few-layers or bulk 1T-VSe _2 , which also shed light on the enhancement of its Curie temperature by enlarging the interlayer distance.https://doi.org/10.1088/1367-2630/abdfef2D materialsVan Hove singularityStoner theorysaddle point |
| spellingShingle | Junyi He Qing Xie Gang Xu Confinement effect enhanced Stoner ferromagnetic instability in monolayer 1T-VSe2 New Journal of Physics 2D materials Van Hove singularity Stoner theory saddle point |
| title | Confinement effect enhanced Stoner ferromagnetic instability in monolayer 1T-VSe2 |
| title_full | Confinement effect enhanced Stoner ferromagnetic instability in monolayer 1T-VSe2 |
| title_fullStr | Confinement effect enhanced Stoner ferromagnetic instability in monolayer 1T-VSe2 |
| title_full_unstemmed | Confinement effect enhanced Stoner ferromagnetic instability in monolayer 1T-VSe2 |
| title_short | Confinement effect enhanced Stoner ferromagnetic instability in monolayer 1T-VSe2 |
| title_sort | confinement effect enhanced stoner ferromagnetic instability in monolayer 1t vse2 |
| topic | 2D materials Van Hove singularity Stoner theory saddle point |
| url | https://doi.org/10.1088/1367-2630/abdfef |
| work_keys_str_mv | AT junyihe confinementeffectenhancedstonerferromagneticinstabilityinmonolayer1tvse2 AT qingxie confinementeffectenhancedstonerferromagneticinstabilityinmonolayer1tvse2 AT gangxu confinementeffectenhancedstonerferromagneticinstabilityinmonolayer1tvse2 |