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Carbon Nanotube Quantum Dots
Author(s) -
Rocha C.G.,
Dargam T.G.,
Latgé A.
Publication year - 2002
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 - 10.1002/1521-3951(200207)232:1<37::aid-pssb37>3.0.co;2-p
Subject(s) - quantum dot , carbon nanotube , condensed matter physics , hamiltonian (control theory) , carbon nanotube quantum dot , tight binding , nanotube , conductance , fermi level , renormalization , heterojunction , materials science , formalism (music) , nanotechnology , electronic structure , physics , quantum mechanics , electron , art , mathematical optimization , musical , mathematics , visual arts
We present a theoretical study of the local electronic properties of quantum‐dot nanotubes composed of different isolated nanotubes joined via modelled junctions (defect pairs composed of heptagon and pentagon along the axial direction of pure nanotubes). The heterostructures are studied following a single π‐band tight‐binding Hamiltonian and adopting real‐space renormalization techniques within the Green's function formalism. The conductance of semiconducting and metallic dots is analysed as a function of the dot sizes for energies close to the Fermi level. Different transport regimes are found depending upon the electronic nature of the dot and also on the contacts.