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Strain-Induced Quantum Spin Hall Effect in Two-Dimensional Methyl-Functionalized Silicene SiCH(3)
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...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6163979/ https://www.ncbi.nlm.nih.gov/pubmed/30205466 http://dx.doi.org/10.3390/nano8090698 |
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author | Ren, Ceng-Ceng Ji, Wei-Xiao Zhang, Shu-Feng Zhang, Chang-Wen Li, Ping Wang, Pei-Ji |
author_facet | Ren, Ceng-Ceng Ji, Wei-Xiao Zhang, Shu-Feng Zhang, Chang-Wen Li, Ping Wang, Pei-Ji |
author_sort | Ren, Ceng-Ceng |
collection | PubMed |
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 (SiCH(3)) have been investigated using first-principles calculations, which show QSH effect under reasonable strain. The origin of the topological characteristic of SiCH(3), is mainly associated with the s-p(xy) orbitals band inversion at Γ point, whilst the band gap appears under the effect of spin-orbital coupling (SOC). The QSH phase of SiCH(3) is confirmed by the topological invariant Z(2) = 1, as well as helical edge states. The SiCH(3) 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. |
format | Online Article Text |
id | pubmed-6163979 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-61639792018-10-10 Strain-Induced Quantum Spin Hall Effect in Two-Dimensional Methyl-Functionalized Silicene SiCH(3) Ren, Ceng-Ceng Ji, Wei-Xiao Zhang, Shu-Feng Zhang, Chang-Wen Li, Ping Wang, Pei-Ji Nanomaterials (Basel) Article 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 (SiCH(3)) have been investigated using first-principles calculations, which show QSH effect under reasonable strain. The origin of the topological characteristic of SiCH(3), is mainly associated with the s-p(xy) orbitals band inversion at Γ point, whilst the band gap appears under the effect of spin-orbital coupling (SOC). The QSH phase of SiCH(3) is confirmed by the topological invariant Z(2) = 1, as well as helical edge states. The SiCH(3) 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. MDPI 2018-09-07 /pmc/articles/PMC6163979/ /pubmed/30205466 http://dx.doi.org/10.3390/nano8090698 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Ren, Ceng-Ceng Ji, Wei-Xiao Zhang, Shu-Feng Zhang, Chang-Wen Li, Ping Wang, Pei-Ji Strain-Induced Quantum Spin Hall Effect in Two-Dimensional Methyl-Functionalized Silicene SiCH(3) |
title | Strain-Induced Quantum Spin Hall Effect in Two-Dimensional Methyl-Functionalized Silicene SiCH(3) |
title_full | Strain-Induced Quantum Spin Hall Effect in Two-Dimensional Methyl-Functionalized Silicene SiCH(3) |
title_fullStr | Strain-Induced Quantum Spin Hall Effect in Two-Dimensional Methyl-Functionalized Silicene SiCH(3) |
title_full_unstemmed | Strain-Induced Quantum Spin Hall Effect in Two-Dimensional Methyl-Functionalized Silicene SiCH(3) |
title_short | Strain-Induced Quantum Spin Hall Effect in Two-Dimensional Methyl-Functionalized Silicene SiCH(3) |
title_sort | strain-induced quantum spin hall effect in two-dimensional methyl-functionalized silicene sich(3) |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6163979/ https://www.ncbi.nlm.nih.gov/pubmed/30205466 http://dx.doi.org/10.3390/nano8090698 |
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