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Transport in carbon nanotubes: Contact models and size effects
Author(s) -
Zienert Andreas,
Schuster Jörg,
Streiter Reinhard,
Gessner Thomas
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.201000178
Subject(s) - carbon nanotube , formalism (music) , electrode , hamiltonian (control theory) , tight binding , materials science , decimation , nanotechnology , electronic structure , physics , condensed matter physics , quantum mechanics , computer science , mathematics , mathematical optimization , art , musical , visual arts , filter (signal processing) , computer vision
We present electronic transport calculations for single wall carbon nanotubes (CNTs) using two highly idealized models to describe the electrodes and their contact to the CNT. In the first model we use CNT‐electrodes and in the second one we apply the wide‐band approximation, neglecting any atomic structure within the electrodes. The single orbital tight‐binding approximation is used to describe the electronic structure of the CNTs. This enables us to apply highly efficient decimation techniques to reduce the size of the finite central Hamiltonian. Semi‐infinite CNT‐electrodes can be included iteratively using a similar method. Electronic transport calculations are carried out within the Landauer formalism.