TITLE:
Electronic Transport through a Graphene Nanoribbon Composed of Nanoribbons of Different Widths
AUTHORS:
Wen Liu, Jie Cheng, Jianhua Zhao, Desheng Liu
KEYWORDS:
Graphene Nanoribbon, Electronic Transport, Negative Differential Resistance
JOURNAL NAME:
Journal of Modern Physics,
Vol.6 No.2,
February
10,
2015
ABSTRACT: 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.