Valle, Miriam del and Tejedor, Carlos and Cuniberti, Gianaurelio (2005) Defective transport properties of three-terminal carbon nanotube junctions. Physical Review B 71, p. 125306.
Other URL: http://dx.doi.org/10.1103/PhysRevB.71.125306
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%.
|Institutions:||Physics > Institute of Theroretical Physics > Retired Professors > Group Gianaurelio Cuniberti|
|Projects:||Graduiertenkolleg Nichtlinearität und Nichtgleichgewicht, Volkswagen Stiftung: Molecular Computing|
|Subjects:||500 Science > 530 Physics|
|Refereed:||Yes, this version has been refereed|
|Created at the University of Regensburg:||Yes|
|Deposited On:||20 Mar 2007|
|Last Modified:||20 Jul 2011 21:01|