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Spin transport in disordered single‐wall carbon nanotubes contacted to ferromagnetic leads
Author(s) -
Krompiewski S.,
Nemec N.,
Cuniberti G.
Publication year - 2006
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200562410
Subject(s) - carbon nanotube , ferromagnetism , condensed matter physics , materials science , magnetoresistance , conductance , nanometre , nanotechnology , spin (aerodynamics) , composite material , magnetic field , physics , thermodynamics , quantum mechanics
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. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)