TY - JOUR T1 - First-principles approach to monitoring the band gap and magnetic state of a graphene nanoribbon via its vacancies A1 - Topsakal, M. A1 - Akturk, E. A1 - Sevincli, H. A1 - Ciraci, S. JA - Physical Review B Y1 - 2008 VL - 78 SP - 235435-1 EP - 6 ER -