Carbon Nanotube Based Magnetic Tunnel Junctions

Details Carbon Nanotube Based Magnetic Tunnel Junctions Carbon Nanotube Based Magnetic Tunnel Junctions

2000-02-13

arxiv.org/abs/cond-mat/0002189v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages with 3 figures. to appear in PRL

Scientific paper

10.1103/PhysRevLett.84.2682

Spin-coherent quantum transport in carbon nanotube magnetic tunnel junctions was investigated theoretically. A spin-valve effect is found for metallic, armchair tubes, with a magneto-conductance ratio ranging up to 20%. Because of the finite length of the nanotube junctions, transport is dominated by resonant transmission. The magnetic tunnel junctions are found to have distinctly different transport behavior depending on whether or not the length of the tubes is commensurate with a 3N+1 rule, with N the number of basic carbon repeat units along the nanotube length.

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