Malko, D.Neiss, C.Viñes Solana, FrancescGörling, Andreas2015-05-042015-05-042012-02-240031-9007https://hdl.handle.net/2445/65316The existence of Dirac cones in the band structure of two-dimensional materials accompanied by unprecedented electronic properties is considered to be a unique feature of graphene related to its hexagonal symmetry. Here, we present other two-dimensional carbon materials, graphynes, that also possess Dirac cones according to first-principles electronic structure calculations. One of these materials, 6,6,12-graphyne, does not have hexagonal symmetry and features two self-doped nonequivalent distorted Dirac cones suggesting electronic properties even more amazing than that of graphene.4 p.application/pdfeng(c) American Physical Society, 2012GrafèPropietats elèctriquesGrapheneElectric propertiesinfo:eu-repo/semantics/article6192762015-05-04info:eu-repo/semantics/openAccess