Theoretical investigation on two-dimensional non-traditional carbon materials employing three-membered ring and four-membered ring as building blocks

A series of two-dimensional non-traditional carbon materials employing three-membered ring or four-membered ring as building blocks were systematically investigated by theoretical calculations in searching of highly conductive metallic carbon materials. It was found all the studied two-dimensional systems have metallic nature. The three-membered ring derivatives are not kinetically stable, and present of trap-like bands. While the four-membered ring systems of C4-8 and its derivatives containing triple bonds are kinetically stable, which provide a new choice of synthesizing two-dimensional carbon materials with metallic nature towards the application in the all carbon electronic circuits.