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Article: Spin-polarized and valley helical edge modes in graphene nanoribbons
| Title | Spin-polarized and valley helical edge modes in graphene nanoribbons | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Authors | |||||||||||||
| Issue Date | 2011 | ||||||||||||
| Publisher | American Physical Society. The Journal's web site is located at http://prb.aps.org/ | ||||||||||||
| Citation | Physical Review B (Condensed Matter and Materials Physics), 2011, v. 84 n. 3, article no. 035431 , p. 1-6 How to Cite? | ||||||||||||
| Abstract | We investigate the electronic properties of zigzag-terminated graphene nanoribbons in the presence of a staggered sublattice potential. We show that due to the edge ferromagnetism, spin-polarized dispersive edge modes with well-defined valley indices can appear inside the bulk band gap opened by the inversion symmetry breaking. These edge modes are helical with respect to their valley indices, hence are robust against scattering from smooth disorder potentials. We further propose a concrete system with a zigzag graphene nanoribbon grown on top of a hexagonal boron-nitride substrate to realize such edge modes. These edge states could be utilized as perfect spin filters or analyzers in spintronics applications. © 2011 American Physical Society. | ||||||||||||
| Persistent Identifier | http://hdl.handle.net/10722/139649 | ||||||||||||
| ISSN | 2014 Impact Factor: 3.736 | ||||||||||||
| ISI Accession Number ID |
Funding Information: Z.Q. was supported by NSF (Grant No. DMR0906025) and Welch Foundation (Grant No. F-1255). Q.N. was supported by DOE (Grant No. DE-FG03-02ER45958, Division of Materials Science and Engineering) and Texas Advanced Research Program. Y.Y. was supported by NSF of China (Grant No. 10974231) and the MOST Project of China (Grants No. 2007CB925000 and No. 2011CBA00100). |
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.author | Qiao, ZH | en_US |
| dc.contributor.author | Yang, SYA | en_US |
| dc.contributor.author | Wang, B | en_US |
| dc.contributor.author | Yao, YG | en_US |
| dc.contributor.author | Niu, Q | en_US |
| dc.date.accessioned | 2011-09-23T05:52:55Z | - |
| dc.date.available | 2011-09-23T05:52:55Z | - |
| dc.date.issued | 2011 | en_US |
| dc.identifier.citation | Physical Review B (Condensed Matter and Materials Physics), 2011, v. 84 n. 3, article no. 035431 , p. 1-6 | - |
| dc.identifier.issn | 1098-0121 | - |
| dc.identifier.uri | http://hdl.handle.net/10722/139649 | - |
| dc.description.abstract | We investigate the electronic properties of zigzag-terminated graphene nanoribbons in the presence of a staggered sublattice potential. We show that due to the edge ferromagnetism, spin-polarized dispersive edge modes with well-defined valley indices can appear inside the bulk band gap opened by the inversion symmetry breaking. These edge modes are helical with respect to their valley indices, hence are robust against scattering from smooth disorder potentials. We further propose a concrete system with a zigzag graphene nanoribbon grown on top of a hexagonal boron-nitride substrate to realize such edge modes. These edge states could be utilized as perfect spin filters or analyzers in spintronics applications. © 2011 American Physical Society. | - |
| dc.language | eng | en_US |
| dc.publisher | American Physical Society. The Journal's web site is located at http://prb.aps.org/ | en_US |
| dc.relation.ispartof | Physical Review B (Condensed Matter and Materials Physics) | en_US |
| dc.rights | Copyright 2011 by The American Physical Society. This article is available online at https://doi.org/10.1103/PhysRevB.84.035431 | - |
| dc.title | Spin-polarized and valley helical edge modes in graphene nanoribbons | en_US |
| dc.type | Article | en_US |
| dc.identifier.email | Wang, B: benwb@hku.hk | en_US |
| dc.description.nature | published_or_final_version | - |
| dc.identifier.doi | 10.1103/PhysRevB.84.035431 | - |
| dc.identifier.scopus | eid_2-s2.0-79961214367 | - |
| dc.identifier.hkuros | 195622 | en_US |
| dc.identifier.volume | 84 | en_US |
| dc.identifier.issue | 3 | - |
| dc.identifier.spage | article no. 035431, p. 1 | - |
| dc.identifier.epage | article no. 035431, p. 6 | - |
| dc.identifier.isi | WOS:000293128900022 | - |
| dc.publisher.place | United States | - |
| dc.identifier.issnl | 1098-0121 | - |