Interplay between geometrical structure and electronic properties in rippled free-standing graphene

P. Partovi-Azar,1 N. Nafari,2,3 and M. Reza Rahimi Tabar3,4 1Computational Physical Science Laboratory, Department of Nano-Science, Institute for Research in Fundamental Sciences (IPM), P.O. Box 19395-5531, Tehran, Iran 2School of Physics, Institute for Research in Fundamental Sciences (IPM), P.O. Box 19395-5531, Tehran, Iran 3Department of Physics, Sharif University of Technology, 11365-9161, Tehran, Iran 4Fachbereich Physik,Universitat Osnabruck, Barbarastrase 7, 49076 Osnabruck, Germany (Received 6 March 2011; published 22 April 2011)