Spin Filtered Edge States and Quantum Hall Effect in Graphene
arXiv:cond-mat/0602645 · doi:10.1103/PhysRevLett.96.176803
Abstract
Electron edge states in graphene in the Quantum Hall effect regime can carry both charge and spin. We show that spin splitting of the zeroth Landau level gives rise to counterpropagating modes with opposite spin polarization. These chiral spin modes lead to a rich variety of spin current states, depending on the spin flip rate. A method to control the latter locally is proposed. We estimate Zeeman spin splitting enhanced by exchange, and obtain a spin gap of a few hundred Kelvin.
4 pages, 3 figs
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