Competition for Graphene: Graphynes with Direction-Dependent Dirac Cones
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Open Access
- 24 February 2012
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 108 (8), 086804
- https://doi.org/10.1103/physrevlett.108.086804
Abstract
The 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. DOI: http://dx.doi.org/10.1103/PhysRevLett.108.086804 Received 26 October 2011Published 24 February 2012© 2012 American Physical SocietyKeywords
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