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Deutsche Physikalische Gessellschaft IOP Institute of Physics

Electronic properties of graphene and graphene nanoribbons with 'pseudo-Rashba' spin-orbit coupling

Focus on Graphene

Tobias Stauber1 and John Schliemann2

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Part of Focus on Graphene

We discuss the electronic properties of graphene and graphene nanoribbons including 'pseudo-Rashba' spin–orbit coupling. After summarizing the bulk properties of massless and massive Dirac particles, we first analyze the scattering behavior close to an infinite mass and zigzag boundary. For low energies, we observe strong deviations from the usual spin-conserving behavior at high energies such as reflection acting as a spin polarizer or switch. This results in spin polarization along the direction of the boundary due to the appearance of evanescent modes in the case of non-equilibrium or when there is no coherence between the two one-particle branches. We then discuss the spin and density distribution of graphene nanoribbons.


PACS

73.22.-f Electronic structure of nanoscale materials: clusters, nanoparticles, nanotubes, and nanocrystals

71.70.Ej Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect

72.25.-b Spin polarized transport

73.63.Fg Nanotubes

Subjects

Condensed matter: electrical, magnetic and optical

Nanoscale science and low-D systems

Dates

Issue 11 (November 2009)

Received 8 June 2009

Published 2 November 2009



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