Nonlocal exchange interaction removes half-metallicity in graphene nanoribbons
2007 (English)In: Nano letters (Print), ISSN 1530-6984, E-ISSN 1530-6992, Vol. 7, no 8, 2211-2213 p.Article in journal (Refereed) Published
Band gap studies of zigzag-edge graphene ribbons are presented. While earlier calculations at LDA level show that zigzag-edge graphene ribbons become half-metallic when cross-ribbon electric fields are applied, our calculations with hybrid density functional demonstrate that finite graphene ribbons behave as half-semiconductors. The spin-dependent band gap can be changed in a wide range, making possible many applications in spintronics.
Place, publisher, year, edition, pages
2007. Vol. 7, no 8, 2211-2213 p.
Electric fields; Energy gap; Ion exchange; Molecular interactions; Semiconductor materials; Graphenes; Nanoribbons; Nonlocal exchange; Zigzag-edge graphene; Nanostructures; carbon; nanotube
IdentifiersURN: urn:nbn:se:kth:diva-7740DOI: 10.1021/nl070593cISI: 000248657800008PubMedID: 17602536ScopusID: 2-s2.0-34548168661OAI: oai:DiVA.org:kth-7740DiVA: diva2:12857
QC 201008172007-12-042007-12-042010-08-17Bibliographically approved