Author(s)

Wen Liu^1*, Jie Cheng¹, Jianhua Zhao¹, Desheng Liu^1,2

¹Physics and Information Engineering Department, Jining University, Qufu, China.
²School of Physics, Shandong University, Jinan, China.

Based on non-equilibrium Green’s function method combined with the density functional theory, we have studied the electronic properties of a graphene nanoribbon (GNR) which is composed of two GNRs with different widths. The results show that the electron transmission is greatly modulated by the applied bias. The current of the system displays negative differential resistance effect, which is attributed to the broadening of the transmission gap with the increase of the bias around the Fermi level.

Graphene Nanoribbon, Electronic Transport, Negative Differential Resistance

Liu, W. , Cheng, J. , Zhao, J. and Liu, D. (2015) Electronic Transport through a Graphene Nanoribbon Composed of Nanoribbons of Different Widths. Journal of Modern Physics, 6, 95-100. doi: 10.4236/jmp.2015.62012.