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51. 


Defective transport properties of three-terminal carbon nanotube junctions



M. del Valle, C. Tejedor, and G. Cuniberti

Physical Review B 71, 125306 (2005)

Selected for the March 28, 2005 issue of the
Virtual Journal of Nanoscale Science & Technology
.

We investigate the transport properties of three-terminal carbon-based nanojunctions within the scattering matrix approach. The stability of such junctions is subordinated to the presence of nonhexagonal arrangements in the molecular network. Such ``defective'' arrangements do influence the resulting quantum transport observables, as a consequence of the possibility of acting as pinning centers of the corresponding wave function. By investigating a fairly wide class of junctions we have found regular mutual dependences between such localized states at the carbon network and a striking behavior of the conductance. In particular, we have shown that Fano resonances emerge as a natural result of the interference between defective states and the extended continuum background. As a consequence, the currents through the junctions hitting these resonant states might experience variations on a relevant scale with current modulations of up to 75%.



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doi absolute link10.1103/PhysRevB.71.125306
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publisher site (ISSN:1550-235X)
online abstractarXiv preprint: cond-mat/0411142
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seleceted abstractVJ Nanoscale Science & Technology entry
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IF(2005): 3.185


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