Electronic Structures of Carbon-Based Kagomé Lattices
ZHANG Dong1**, LIN Liang-Zhong1, ZHU Jia-Ji2
1The State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083 2Center for Modern Physics and Department of Physics, Chongqing University, Chongqing 400044
Abstract：A structurally stable two-dimensional carbon allotrope of graphene is studied theoretically based on the first-principles calculations. This allotrope can be formed by inserting acetylene and diacetylene fragments into β-graphyne. The calculations on structure and electronic energy spectra show that the carbon Kagomé lattice is a structurally stable semimetal with the Dirac cones below the Fermi surface, in contrast to the Dirac points at the Fermi surface in intrinsic graphene.
2014, Vol. 31 
