| Cite this article as: Song Han,Zhang Hong-Yi,Ping Shu-Yue,Dong Bo-Fang,Zhao Yi-Dan,Shi Jin-Lei. Investigation on spin-splitting and half-metallicity of silicene bilayer nanotube [J]. J. At. Mol. Phys.(原子与分子物理学报), 2023, 40: 012004 (in Chinese) |
| Investigation on spin-splitting and half-metallicity of silicene bilayer nanotube |
| Hits 544 Download times 135 Received:November 04, 2021 Revised:November 30, 2021 |
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| Key Words
Bilayer silicene nanotube Spin-splitting Half-metallicity First-principles calculations |
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| Abstract
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| Searching for half-metallicity in low-dimensional materials has important significance for the realization of nano-spintronic devices. Based on first-principles calculations, we investigate that the relationship between the AB-stacking structure and the antiferromagnetic configuration for the ground state of the bilayer silicene. Moreover, we theoretically show that bilayer silicene nanotube can reach half-metallicity. Due to the negative deformation potential of conduction band minimum and valence band maximum of bilayer silicene, the originally degenerate spatial spin distribution symmetry will be broken under bending, and the energetic degeneracy of opposite spin states is lifted. Combined with the result from the first-principles calculations, we find that the bilayer silicene nanotube (55, 0) has half-metallicity and good magnetic stability. This result provides a theoretical guidance for the realization of half-metallicity of low-dimensional material systems. |
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