Open AccessTight binding studies on the electronic structure of graphene nanoribbons
Author(s) -
Hu Hai-Xin,
Zhenhua Zhang,
Liu Xin-Hai,
Ming Qiu,
Ding Kai-He
Publication year - 2009
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.58.7156
Subject(s) - graphene , materials science , tight binding , graphene nanoribbons , condensed matter physics , electronic structure , dispersion relation , binding energy , electron , metal , nanotechnology , physics , quantum mechanics , metallurgy
Based on the π-electron energy dispersion relation of general compound lattices derived from the tight-binding model, and assuming that the transverse confinement potential of graphene nanoribbon is a infinite hard-wall potentialwe obtain the energy dispersion relation of graphene nanoribbon and the conditions that determine whether it is metallic or semi-conducting. The results presented here show that the electronic structure of graphene nanoribbon is intimately related to its geometric structure symmetry and widthso graphene nanoribbon can be modified as metallic or semi-conducting materials only by controlling its geometric configurationswhich suggests that it is highly promising to use graphene nanoribbon to develop novel nano-scale devices.