Crystal structure of α-graphdiyne.(a) A unit cell and (b) a 4×4 supercell. (c) A simplified model to mimic the hopping matrix elements along two carbon triple bonds in α-graphdiyne. Carbon atoms 1 and 6 are at vertices of a hexagon in α-graphdiyne. The black balls and blue line represent carbon atoms and the crystalline cell, respectively.
Niu et al. Nanoscale Research Letters 2013 8:469 doi:10.1186/1556-276X-8-469