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Electron transport in carbon nanotube-metal systems: contact effects | | N. Ranjan
; R. Gutierrez-Laliga
; S. Krompiewski
; G. Cuniberti
; | | Date: |
25 Jul 2005 | | Journal: | Molecular Physics Reports 40, 125 (2004) | | Subject: | Mesoscopic Systems and Quantum Hall Effect; Materials Science | cond-mat.mes-hall cond-mat.mtrl-sci | | Abstract: | Carbon nanotubes (CNT) have a very large application potential in the rapid developing field of molecular electronics. Infinite single-wall metallic CNTs have theoretically a conductance of 4e2/h because of the two electronic bands crossing the Fermi level. For finite size CNTs experiments have shown that other values are also possible, indicating a very strong influence of the contacts. We study electron transport in single- and double-wall CNTs contacted to metallic electrodes within the Landauer formalism combined with Green function techniques. We show that the symmetry of the contact region may lead to blocking of a transport channel. In the case of double-wall CNTs with both inner and outer shells being metallic, non-diagonal self energy contributions from the electrodes may induce channel mixing, precluding a simple addition of the individual shell conductances. | | Source: | arXiv, cond-mat/0507566 | | Services: | Forum | Review | PDF | Favorites | |
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