Modern electronic technology based on silicon semiconductor is faced with the limit from thermal effect and quantum effect. Therefore, to look for new alternative materials physics becomes to be an important research subject for physics, chemistry and materials science. The grapheme and graphyne, as the representative of the Dirac system, promise great potential applications and the value in the nanoelectronic devices. Dirac systems commonly are two-dimentional(2D) semimetal with zero band gap. Their structural cutting and band gap opening must be first solved in the design and application of ...