Electronic and transport properties of T-graphene nanoribbon: Symmetry-dependent multiple Dirac points, negative differential resistance and linear current-bias characteristicsC. J. Dai, X. H. Yan, Y. Xiao and Y. D. GuoEPL, 107 3 (2014) 37004DOI: https://doi.org/10.1209/0295-5075/107/37004