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15. 


Electron transport in nanotube-molecular wire hybrids



G. Fagas, G. Cuniberti, and K. Richter

Physical Review B 63, 045416 (2001)

Selected for the January 15, 2001 issue of the
Virtual Journal of Nanoscale Science & Technology
.

We study contact effects on electron transport across a molecular wire sandwiched between two semi-infinite (carbon) nanotube leads as a model for nanoelectrodes. Employing the Landauer scattering matrix approach we find that the conductance is very sensitive to parameters such as the coupling strength and geometry of the contact. The conductance exhibits markedly different behavior in the two limiting scenarios of single contact and multiple contacts between the molecular wire and the nanotube interfacial atoms. In contrast to a single contact the multiple-contact configuration acts as a filter selecting single transport channels. It exhibits a scaling law for the conductance as a function of coupling strength and tube diameter. We also observe an unusual narrow-to-broad-to-narrow behavior of conductance resonances upon decreasing the coupling.



online .pdf paper (for personal use only)online .pdf paper (for personal use only)
doi absolute link10.1103/PhysRevB.63.045416
online abstract at the publisher site
publisher site (ISSN:1550-235X)
online abstractarXiv preprint: cond-mat/0008150
CiteBaseCiteBase
seleceted abstractVJ Nanoscale Science & Technology entry
mpi-pks/0008003
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export EndNote citation (ris file)
IF(2001): 3.070


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