Theoretical Study of Carrier Mobility in Two-Dimensional Tetragonal Carbon Allotrope from Porous Graphene**Supported by the Fundamental Research Funds for the Central Universities, the Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions, and the National Natural Science Foundation of China under Grant No 11204123.

Abstract

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 Γ point. T-CA possesses a high carrier mobility of the order of 104 cm2 V–1 s−1. As our study demonstrates, T-CA has potential applications for next-generation electronic materials.