Narjes Gorjizadeh et al 2009 Nanotechnology 20 015201 doi:10.1088/0957-4484/20/1/015201
Narjes Gorjizadeh1, Amir A Farajian2 and Yoshiyuki Kawazoe1
Show affiliationsThe quantum conductance of graphene nanoribbons that include vacancy and adatom–vacancy defects is studied for both armchair and zigzag edge structures. The conductance is calculated by using the Green's function formalism combined with a tight-binding method for the description of the system. Our results reveal that, owing to the localized states that appear near the defect sites, the conductance of the defected nanoribbons generally decreases. We show that details of the conductance reduction depend on the structure of the defect, its distance from the ribbon edges, and the ribbon width. While some defect structures cause the conductance of the ribbon to vanish, some other defects have no effect on the conductance at the Fermi energy.
71.20.Tx Fullerenes and related materials; intercalation compounds
73.63.-b Electronic transport in nanoscale materials and structures
Condensed matter: electrical, magnetic and optical
Issue 1 (7 January 2009)
Received 4 September 2008, in final form 27 October 2008
Published 5 December 2008
Narjes Gorjizadeh et al 2009 Nanotechnology 20 015201
Tae-Wook Kim et al 2009 Nanotechnology 20 025201
Minglei Ji et al 2009 Nanotechnology 20 075101
Kevin Bube et al 2006 J. Phys. D: Appl. Phys. 39 1405
J Raju et al 1990 Meas. Sci. Technol. 1 903
H Bunz et al 2008 Environ. Res. Lett. 3 035001
O Möhler et al 2008 Environ. Res. Lett. 3 025007
I V Gensch et al 2008 Environ. Res. Lett. 3 035003
J T Pisano et al 2003 Meas. Sci. Technol. 14 2089
K T Park et al 1987 J. Phys. C: Solid State Phys. 20 1241