Half-metallic quantum valley Hall effect in biased zigzag-edge bilayer graphene nanoribbons
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Lee, Kyu Won | - |
dc.contributor.author | Lee, Cheol Eui | - |
dc.date.accessioned | 2021-09-03T09:19:11Z | - |
dc.date.available | 2021-09-03T09:19:11Z | - |
dc.date.created | 2021-06-16 | - |
dc.date.issued | 2017-02-27 | - |
dc.identifier.issn | 2469-9950 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/84396 | - |
dc.description.abstract | We have investigated electron-electron interaction effects on gapless edge states in the antiferromagnetic phase of zigzag-edge bilayer graphene nanoribbons under a voltage bias between the layers by using a tight-binding model with on-site Coulomb interactions. We found that a zigzag-edge bilayer graphene nanoribbon can have gapless edge states corresponding to peculiar topologically nontrivial insulator phases, such as a half-metallic quantum valley Hall phase. The half-metallicity was found to be due to the on-site Coulomb interactions through which excess charges produced by the voltage bias between the layers give rise to the potential difference between the opposite edges. A topological phase diagram in the antiferromagnetic phase of a zigzag-edge bilayer graphene nanoribbon was determined as a function of the bias voltage and the ribbon width. The quantum confinement effect, which was found to be graphene-like for narrow ribbons and to be bilayer graphene-like for wide ribbons, was also confirmed to play an important role in determining the topologically nontrivial insulator phases. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | AMER PHYSICAL SOC | - |
dc.subject | TRANSPORT | - |
dc.subject | STATES | - |
dc.subject | ORDER | - |
dc.title | Half-metallic quantum valley Hall effect in biased zigzag-edge bilayer graphene nanoribbons | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Lee, Kyu Won | - |
dc.contributor.affiliatedAuthor | Lee, Cheol Eui | - |
dc.identifier.doi | 10.1103/PhysRevB.95.085145 | - |
dc.identifier.scopusid | 2-s2.0-85014643549 | - |
dc.identifier.wosid | 000395992000009 | - |
dc.identifier.bibliographicCitation | PHYSICAL REVIEW B, v.95, no.8 | - |
dc.relation.isPartOf | PHYSICAL REVIEW B | - |
dc.citation.title | PHYSICAL REVIEW B | - |
dc.citation.volume | 95 | - |
dc.citation.number | 8 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Materials Science | - |
dc.relation.journalResearchArea | Physics | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Multidisciplinary | - |
dc.relation.journalWebOfScienceCategory | Physics, Applied | - |
dc.relation.journalWebOfScienceCategory | Physics, Condensed Matter | - |
dc.subject.keywordPlus | TRANSPORT | - |
dc.subject.keywordPlus | STATES | - |
dc.subject.keywordPlus | ORDER | - |
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.
(02841) 서울특별시 성북구 안암로 14502-3290-1114
COPYRIGHT © 2021 Korea University. All Rights Reserved.
Certain data included herein are derived from the © Web of Science of Clarivate Analytics. All rights reserved.
You may not copy or re-distribute this material in whole or in part without the prior written consent of Clarivate Analytics.