Spin injection and perpendicular spin transport in graphite nanostructures

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Banerjee, Tamalika and Wiel van der, Wilfred G. and Jansen, Ron (2010) Spin injection and perpendicular spin transport in graphite nanostructures. Physical Review B: Condensed matter and materials physics, 81 . p. 2144091. ISSN 1098-0121

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Abstract:Organic- and carbon-based materials are attractive for spintronics because their small spin-orbit coupling and low hyperfine interaction is expected to give rise to large spin-relaxation times. However, the corresponding spin-relaxation length is not necessarily large when transport is via weakly interacting molecular orbitals. Here we use graphite as a model system and study spin transport in the direction perpendicular to the weakly bonded graphene sheets. We achieve injection of highly 75% spin-polarized electrons into graphite nanostructures of 300–500 nm across and up to 17 nm thick, and observe transport without any measurable loss of spin information. Direct visualization of local spin transport in graphite-based spin-valve sandwiches also shows spatially uniform and near-unity transmission for electrons at 1.8 eV above the Fermi level.
Item Type:Article
Copyright:© 2010 American Physical Society
Faculty:
Electrical Engineering, Mathematics and Computer Science (EEMCS)
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Link to this item:http://purl.utwente.nl/publications/75633
Official URL:http://dx.doi.org/10.1103/PhysRevB.81.214409
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