Krompiewski, S. (2007) Ballistic magnetoresistance in small-size carbon nanotubes devices. Journal of Magnetism and Magnetic Materials 310, p. 2439.
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Other URL: http://dx.doi.org/10.1016/j.jmmm.2006.10.907
We theoretically study the magnetoresistance of single wall carbon nanotubes (SWCNTs) in the ballistic transport regime, using a standard tight-binding approach. The main attention is directed to spin-polarized electrical transport in the presence of either axial or perpendicular magnetic field. The method takes into account both Zeeman splitting as well as size and chirality effects. These factors (along with a broadening of energy levels due to a strong nanotube/electrode coupling) lead, in ultra small SWCNTs, to serious modifications in profile of the Aharonov-Bohm oscillations. Other noteworthy findings are that in the parallel configuration (axial magnetic field) the ballistic magnetoconductance is negative (positive) for armchair (semiconducting zigzag) nanotubes, whereas in the perpendicular configuration the magnetoresistance is nearly zero both for armchair and zigzag SWCNTs.
|Institutions:||Physics > Institute of Theroretical Physics > Retired Professors > Group Gianaurelio Cuniberti|
|Projects:||SFB 689: Spinphänomene in reduzierten Dimensionen|
|Subjects:||500 Science > 530 Physics|
|Refereed:||Yes, this version has been refereed|
|Created at the University of Regensburg:||Yes|
|Deposited On:||15 Nov 2007|
|Last Modified:||05 Aug 2009 13:40|