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Conductance of functionalized nanotubes, graphene and nanowires: from ab initio to mesoscopic physics
Author(s) -
Blase X.,
Adessi C.,
Biel B.,
LopezBezanilla A.,
FernándezSerra M.V.,
Margine E. R.,
Triozon F.,
Roche S.
Publication year - 2010
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201000135
Subject(s) - mesoscopic physics , graphene , materials science , mean free path , nanowire , ab initio , conductance , nanotechnology , doping , condensed matter physics , graphene nanoribbons , surface modification , chemical physics , physics , chemistry , quantum mechanics , optoelectronics , electron
We review recent theoretical results aiming at understanding the impact of doping and functionalization on the electronic transport properties of nanotubes, nanowires and graphene ribbons. On the basis of ab initio calculations, the conductance of micrometer long tubes or ribbons randomly doped or grafted can be studied, allowing to extract quantities at mesoscopic length scales such as the elastic mean free path and localization length. While the random modification of a 1D conducting channel leads generaly to a significant loss of conductance, strategies can be found to either exploit or limitate such a detrimental effect. Spin‐filtering in transition metal doped nanotubes, the opening of a mobility gap in graphene ribbons, and the choice of molecules to limitate backscattering in covalently functionalized tubes are examples that will be discussed.Symbolic representation of a nanotube filled with Cobalt atoms or clusters with subsequent optimal spinvalve effect (see text).