Spin-Filtered Edge States and Quantum Hall Effect in Graphene

2006/02/28 by Dmitry A. Abanin, D. A. Abanin, Patrick A. Lee +3 · 9 citations
Materials Science · Physics and Astronomy · #Graphene research and applications #Quantum and electron transport phenomena #Topological Materials and Phenomena #cond-mat.mes-hall #cond-mat.str-el

paper · pdf · doi:10.1103/physrevlett.96.176803

published as Phys. Rev. Lett. 96, 176803 (2006) · 4 pages, 3 figs

arxiv created 2006/04/14 · openalex publication_date 2006/05/03 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

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.

Citations

• Electric Field Effect in Atomically Thin Carbon Films

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