Theoretical Study of Carrier Mobility in Two-Dimensional Tetragonal Carbon Allotrope from Porous Graphene

The carrier mobility of two-dimensional tetragonal carbon allotrope (T-CA) from porous graphene is investigated by first-principles calculations. T-CA can be constructed from divacancy and Stone–Thrower–Wales defects from graphene. T-CA is a direct semiconductor with a band gap of 0.4 eV at \it \Gamma point. T-CA possesses a high carrier mobility of the order of 10^4 cm^2V^-1s^-1. As our study demonstrates, T-CA has potential applications for next-generation electronic materials.