Spin transport in disordered single-wall carbon nanotubes contacted to ferromagnetic leads

Details Spin transport in disordered single-wall carbon nanotubes contacted to ferromagnetic leads Spin transport in disordered single-wall carbon nanotubes contacted to ferromagnetic leads

2005-09-06

arxiv.org/abs/cond-mat/0509148v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

9 pages, 5 figures, presented at the European Conference PHYSICS OF MAGNETISM 2005, Poznan, Poland

Scientific paper

10.1002/pssb.200562410

Recent conductance measurements on multi-wall carbon nanotubes (CNTs) reveal an effective behavior similar to disordered single-wall CNTs. This is due to the fact that electric current flows essentially through the outermost shell and is strongly influenced by inhomogeneous electrostatic potential coming from the inner tubes. Here, we present theoretical studies of spin-dependent transport through disorder-free double-wall CNTs as well as single-wall CNTs with Anderson-type disorder. The CNTs are end-contacted to ferromagnetic electrodes modelled as fcc (111) surfaces. Our results shed additional light on the giant magnetoresistance effect in CNTs. Some reported results concern realistically long CNTs, up to several hundred nanometers.

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