Tunable electronic structure and magnetic anisotropy in bilayer ferromagnetic semiconductor Cr2Ge2Te6
Abstract The emergence of ferromagnetism in two-dimensional van der Waals materials has aroused broad interest. However, the ferromagnetic instability has been a problem remained. In this work, by using the first-principles calculations, we identified the critical ranges of strain and doping for the...
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Nature Portfolio
2021
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oai:doaj.org-article:3716ede14f8c4405b362187ab26bf2c52021-12-02T14:06:50ZTunable electronic structure and magnetic anisotropy in bilayer ferromagnetic semiconductor Cr2Ge2Te610.1038/s41598-021-82394-y2045-2322https://doaj.org/article/3716ede14f8c4405b362187ab26bf2c52021-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-82394-yhttps://doaj.org/toc/2045-2322Abstract The emergence of ferromagnetism in two-dimensional van der Waals materials has aroused broad interest. However, the ferromagnetic instability has been a problem remained. In this work, by using the first-principles calculations, we identified the critical ranges of strain and doping for the bilayer Cr2Ge2Te6 within which the ferromagnetic stability can be enhanced. Beyond the critical range, the tensile strain can induce the phase transition from the ferromagnetic to the antiferromagnetic, and the direction of magnetic easy axis can be converted from out-of-plane to in-plane due to the increase of compressive strain, or electrostatic doping. We also predicted an electron doping range, within which the ferromagnetism can be enhanced, while the ferromagnetic stability was maintained. Moreover, we found that the compressive strain can reverse the spin polarization of electrons at the conduction band minimum, so that two categories of half-metal can be induced by controlling electrostatic doping in the bilayer Cr2Ge2Te6. These results should shed a light on achieving ferromagnetic stability for low-dimensional materials.Wen-ning RenKui-juan JinJie-su WangChen GeEr-Jia GuoCheng MaCan WangXiulai XuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-9 (2021) |
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Medicine R Science Q Wen-ning Ren Kui-juan Jin Jie-su Wang Chen Ge Er-Jia Guo Cheng Ma Can Wang Xiulai Xu Tunable electronic structure and magnetic anisotropy in bilayer ferromagnetic semiconductor Cr2Ge2Te6 |
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Abstract The emergence of ferromagnetism in two-dimensional van der Waals materials has aroused broad interest. However, the ferromagnetic instability has been a problem remained. In this work, by using the first-principles calculations, we identified the critical ranges of strain and doping for the bilayer Cr2Ge2Te6 within which the ferromagnetic stability can be enhanced. Beyond the critical range, the tensile strain can induce the phase transition from the ferromagnetic to the antiferromagnetic, and the direction of magnetic easy axis can be converted from out-of-plane to in-plane due to the increase of compressive strain, or electrostatic doping. We also predicted an electron doping range, within which the ferromagnetism can be enhanced, while the ferromagnetic stability was maintained. Moreover, we found that the compressive strain can reverse the spin polarization of electrons at the conduction band minimum, so that two categories of half-metal can be induced by controlling electrostatic doping in the bilayer Cr2Ge2Te6. These results should shed a light on achieving ferromagnetic stability for low-dimensional materials. |
format |
article |
author |
Wen-ning Ren Kui-juan Jin Jie-su Wang Chen Ge Er-Jia Guo Cheng Ma Can Wang Xiulai Xu |
author_facet |
Wen-ning Ren Kui-juan Jin Jie-su Wang Chen Ge Er-Jia Guo Cheng Ma Can Wang Xiulai Xu |
author_sort |
Wen-ning Ren |
title |
Tunable electronic structure and magnetic anisotropy in bilayer ferromagnetic semiconductor Cr2Ge2Te6 |
title_short |
Tunable electronic structure and magnetic anisotropy in bilayer ferromagnetic semiconductor Cr2Ge2Te6 |
title_full |
Tunable electronic structure and magnetic anisotropy in bilayer ferromagnetic semiconductor Cr2Ge2Te6 |
title_fullStr |
Tunable electronic structure and magnetic anisotropy in bilayer ferromagnetic semiconductor Cr2Ge2Te6 |
title_full_unstemmed |
Tunable electronic structure and magnetic anisotropy in bilayer ferromagnetic semiconductor Cr2Ge2Te6 |
title_sort |
tunable electronic structure and magnetic anisotropy in bilayer ferromagnetic semiconductor cr2ge2te6 |
publisher |
Nature Portfolio |
publishDate |
2021 |
url |
https://doaj.org/article/3716ede14f8c4405b362187ab26bf2c5 |
work_keys_str_mv |
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_version_ |
1718391955074842624 |