Nonlocal spin transport in single-walled carbon nanotube networks
Yang, H. Itkis, M.E. Moriya, R. Rettner, C. Jeong, J.-S. Pickard, D.S. Haddon, R.C. Parkin, S.S.P.
Itkis, M.E.
Moriya, R.
Rettner, C.
Jeong, J.-S.
Haddon, R.C.
Parkin, S.S.P.
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Abstract
Spin transport in carbon-based materials has stimulated much interest due to their ballistic conductance and a long phase coherence length. While much research has been conducted on individual carbon nanotubes, current growth and placement techniques are incompatible with large-scale fabrication. Here, we report on nonlocal spin injection and detection in single-walled carbon nanotube networks. We observe spin transport over a distance of 1 μm and extract a spin diffusion length of 1.6-2.4 μm with an injected spin polarization from CoFe into nanotube network of 18%-41%. Our observations demonstrate that spin transport is possible in carbon nanotube networks due to the formation of natural tunnel barriers between nanotubes and metallic contacts. © 2012 American Physical Society.
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Source Title
Physical Review B - Condensed Matter and Materials Physics
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Date
2012-02-13
DOI
10.1103/PhysRevB.85.052401
Type
Article