On Jul 12, 2008, at 11:25 , meisam aghtar wrote > I want to calculate the density of state of graphene > but there is a problem that it is extremely variant by > changing the parameters. the best plot of DOS that > I could find is linear at fermi energy but there is a gap there.
2-d graphene has zero gap only at isolated points of the Brillouin Zone. Reproducing the exact behavior around those points with numerical calculations and algorithms devised to work in 3-d is impractical to say the least. Paolo --- Paolo Giannozzi, Dept of Physics, University of Udine via delle Scienze 208, 33100 Udine, Italy Phone +39-0432-558216, fax +39-0432-558222
