Metallic Graphene Nanodisks

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dc.creatorEzawa, Motohiko
dc.date2007-07-03
dc.date.accessioned2026-07-07T08:49:06Z
dc.date.available2026-07-07T08:49:06Z
dc.descriptionWe explore the electronic properties of finite-length graphene nanoribbons as well as graphene nanodisks with various sizes and shapes in quest of metallic ones. For this purpose it is sufficient to search zero-energy states. We find that there exist no zero-energy states in finite-length zigzag nanoribbons though all infinite-length zigzag nanoribbons have zero-energy states. The occurrence of zero-energy states is surprisingly rare. Among typical nanodisks, only trigonal zigzag nanodisks have degenerate zero-energy states and show metallic ferromagnetism, where the degeneracy can be controlled arbitrarily by designing the size. A remarkable property is that the relaxation time is quite large in spite of its small size in trigonal zigzag nanodisks.
dc.description6 pages, 10 figures
dc.identifierhttps://arxiv.org/abs/0707.0349
dc.identifierhttp://arxiv.org/abs/0707.0349
dc.identifierPhysical Review B 76, 245415 (2007)
dc.identifierdoi:10.1103/PhysRevB.76.245415
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/144176
dc.subjectMesoscale and Nanoscale Physics
dc.subjectMaterials Science
dc.titleMetallic Graphene Nanodisks
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