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Quantum transport through finite length double‐walled carbon nanotubes
Author(s) -
Yang Linfeng,
Chen Jiangwei,
Zhang Jizhou,
Zhang Jingchang
Publication year - 2006
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.200541209
Subject(s) - antiresonance , zigzag , conductance , carbon nanotube , condensed matter physics , oscillation (cell signaling) , quantum wire , quantum , quantum dot , fermi energy , nanotechnology , materials science , chemistry , physics , quantum mechanics , electron , biochemistry , geometry , mathematics , resonance (particle physics)
Using tight binding‐based Green's function approach, we studied the quantum transport property of double‐walled carbon nanotubes (DWNTs). Our calculations show that the transport property is mainly determined by the outer wall; the effect of inter‐wall interaction on quantum conductance is quite different for commensurate and incommensurate DWNTs in ideal contacts case: the conductance oscillations vs. Fermi energy only exist in commensurate DWNTs, the quantum conductance step still exists in incommensurate DWNTs except for few deep dips, which result from the antiresonance with edge states in inner tube. In the nonideal electrical contacts cases, however, the conductance oscillations can be induced in both the commensurate and incommensurate DWNTs. The slow background oscillation of the fast conductance oscillations can also be seen if the outer wall is not zigzag type. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)