Quantum spin-valley Hall effect in AB-stacked bilayer silicene
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Lee, Kyu Won | - |
dc.contributor.author | Lee, Cheol Eui | - |
dc.date.accessioned | 2021-08-31T20:02:28Z | - |
dc.date.available | 2021-08-31T20:02:28Z | - |
dc.date.created | 2021-06-19 | - |
dc.date.issued | 2019-12-19 | - |
dc.identifier.issn | 2045-2322 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/60898 | - |
dc.description.abstract | Our density functional theory calculations show that while AB-stacked bilayer silicene has a non-quantized spin-valley Chern number, there exist backscattering-free gapless edge states within the bulk gap, leading to a quantum spin-valley Hall effect. Using a tight-binding model for a honeycomb bilayer, we found that the interlayer potential difference and the staggered AB-sublattice potential lead to abrupt and gradual change of the valley Chern number from a quantized value to zero, respectively, while maintaining backscattering-free gapless edge states if the valley Chern number is not too close to zero. Under an inversion symmetry-breaking potential in the form of the staggered AB-sublattice potential, such as an antiferromagnetic order and a hexagonal diatomic sheet, a finite but non-quantized (spin-)valley Chern number can correspond to a quantum (spin-)valley Hall insulator. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | NATURE PUBLISHING GROUP | - |
dc.title | Quantum spin-valley Hall effect in AB-stacked bilayer silicene | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Lee, Kyu Won | - |
dc.contributor.affiliatedAuthor | Lee, Cheol Eui | - |
dc.identifier.doi | 10.1038/s41598-019-55927-9 | - |
dc.identifier.scopusid | 2-s2.0-85076907253 | - |
dc.identifier.wosid | 000508836900020 | - |
dc.identifier.bibliographicCitation | SCIENTIFIC REPORTS, v.9 | - |
dc.relation.isPartOf | SCIENTIFIC REPORTS | - |
dc.citation.title | SCIENTIFIC REPORTS | - |
dc.citation.volume | 9 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Science & Technology - Other Topics | - |
dc.relation.journalWebOfScienceCategory | Multidisciplinary Sciences | - |
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