Strain-Induced Quantum Spin Hall Effect in Two-Dimensional Methyl-Functionalized Silicene SiCH3
Quantum Spin Hall (QSH) has potential applications in low energy consuming spintronic devices and has become a researching hotspot recently. It benefits from insulators feature edge states, topologically protected from backscattering by time-reversal symmetry. The properties of methyl functionalized...
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MDPI AG
2018-09-01
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| Series: | Nanomaterials |
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| Online Access: | http://www.mdpi.com/2079-4991/8/9/698 |
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| author | Ceng-Ceng Ren Wei-Xiao Ji Shu-Feng Zhang Chang-Wen Zhang Ping Li Pei-Ji Wang |
| author_facet | Ceng-Ceng Ren Wei-Xiao Ji Shu-Feng Zhang Chang-Wen Zhang Ping Li Pei-Ji Wang |
| author_sort | Ceng-Ceng Ren |
| collection | DOAJ |
| description | Quantum Spin Hall (QSH) has potential applications in low energy consuming spintronic devices and has become a researching hotspot recently. It benefits from insulators feature edge states, topologically protected from backscattering by time-reversal symmetry. The properties of methyl functionalized silicene (SiCH3) have been investigated using first-principles calculations, which show QSH effect under reasonable strain. The origin of the topological characteristic of SiCH3, is mainly associated with the s-pxy orbitals band inversion at Γ point, whilst the band gap appears under the effect of spin-orbital coupling (SOC). The QSH phase of SiCH3 is confirmed by the topological invariant Z2 = 1, as well as helical edge states. The SiCH3 supported by hexagonal boron nitride (BN) film makes it possible to observe its non-trivial topological phase experimentally, due to the weak interlayer interaction. The results of this work provide a new potential candidate for two-dimensional honeycomb lattice spintronic devices in spintronics. |
| first_indexed | 2024-12-20T19:57:55Z |
| format | Article |
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| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-12-20T19:57:55Z |
| publishDate | 2018-09-01 |
| publisher | MDPI AG |
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| series | Nanomaterials |
| spelling | doaj.art-c8b6e2b199084e5eb95d98c8c3e2e31e2022-12-21T19:28:08ZengMDPI AGNanomaterials2079-49912018-09-018969810.3390/nano8090698nano8090698Strain-Induced Quantum Spin Hall Effect in Two-Dimensional Methyl-Functionalized Silicene SiCH3Ceng-Ceng Ren0Wei-Xiao Ji1Shu-Feng Zhang2Chang-Wen Zhang3Ping Li4Pei-Ji Wang5School of Physics, University of Jinan, Jinan 250022, ChinaSchool of Physics, University of Jinan, Jinan 250022, ChinaSchool of Physics, University of Jinan, Jinan 250022, ChinaSchool of Physics, University of Jinan, Jinan 250022, ChinaSchool of Physics, University of Jinan, Jinan 250022, ChinaSchool of Physics, University of Jinan, Jinan 250022, ChinaQuantum Spin Hall (QSH) has potential applications in low energy consuming spintronic devices and has become a researching hotspot recently. It benefits from insulators feature edge states, topologically protected from backscattering by time-reversal symmetry. The properties of methyl functionalized silicene (SiCH3) have been investigated using first-principles calculations, which show QSH effect under reasonable strain. The origin of the topological characteristic of SiCH3, is mainly associated with the s-pxy orbitals band inversion at Γ point, whilst the band gap appears under the effect of spin-orbital coupling (SOC). The QSH phase of SiCH3 is confirmed by the topological invariant Z2 = 1, as well as helical edge states. The SiCH3 supported by hexagonal boron nitride (BN) film makes it possible to observe its non-trivial topological phase experimentally, due to the weak interlayer interaction. The results of this work provide a new potential candidate for two-dimensional honeycomb lattice spintronic devices in spintronics.http://www.mdpi.com/2079-4991/8/9/698quantum spin hall effectspin-orbital couplingsiliceneSiCH3 |
| spellingShingle | Ceng-Ceng Ren Wei-Xiao Ji Shu-Feng Zhang Chang-Wen Zhang Ping Li Pei-Ji Wang Strain-Induced Quantum Spin Hall Effect in Two-Dimensional Methyl-Functionalized Silicene SiCH3 Nanomaterials quantum spin hall effect spin-orbital coupling silicene SiCH3 |
| title | Strain-Induced Quantum Spin Hall Effect in Two-Dimensional Methyl-Functionalized Silicene SiCH3 |
| title_full | Strain-Induced Quantum Spin Hall Effect in Two-Dimensional Methyl-Functionalized Silicene SiCH3 |
| title_fullStr | Strain-Induced Quantum Spin Hall Effect in Two-Dimensional Methyl-Functionalized Silicene SiCH3 |
| title_full_unstemmed | Strain-Induced Quantum Spin Hall Effect in Two-Dimensional Methyl-Functionalized Silicene SiCH3 |
| title_short | Strain-Induced Quantum Spin Hall Effect in Two-Dimensional Methyl-Functionalized Silicene SiCH3 |
| title_sort | strain induced quantum spin hall effect in two dimensional methyl functionalized silicene sich3 |
| topic | quantum spin hall effect spin-orbital coupling silicene SiCH3 |
| url | http://www.mdpi.com/2079-4991/8/9/698 |
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