Fig. 9
From: HOT Graphene and HOT Graphene Nanotubes: New Low Dimensional Semimetals and Semiconductors
Calculated band gaps (black line) and distance Δkm (red line) between kHOT and the nearest k line in (1,0) n tubes. Inserted graphs are the BZ near the Γ point with allowed k lines km (m = 1, 2, 3) (dash lines) and the Fermi point of HOT graphene nanotubes kHOT (red points) in tube (a) (1,0)7, (b) (1,0)12, (c) (1,0)17, (d) (1,0)23, (e) (1,0)4, and (f) (1,0)3. (g) Band structures and DOS of tube (1,0)15