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Intrinsic and Rashba Spin-orbit Interactions in Graphene Sheets | Hongki Min
; J.E. Hill
; N.A. Sinitsyn
; B.R. Sahu
; Lenonard Kleinman
; A.H. MacDonald
; | Date: |
20 Jun 2006 | Subject: | Mesoscopic Systems and Quantum Hall Effect | Abstract: | Starting from a microscopic tight-binding model and using second order perturbation theory, we derive explicit expressions for the intrinsic and Rashba spin-orbit interaction induced gaps in the Dirac-like low-energy band structure of an isolated graphene sheet. The Rashba interaction parameter is first order in the atomic carbon spin-orbit coupling strength $xi$ and first order in the external electric field $E$ perpendicular to the graphene plane, whereas the intrinsic spin-orbit interaction which survives at E=0 is second order in $xi$. The spin-orbit terms in the low-energy effective Hamiltonian have the form proposed recently by Kane and Mele. extit{Ab initio} electronic structure calculations were performed as a partial check on the validity of the tight-binding model. | Source: | arXiv, cond-mat/0606504 | Services: | Forum | Review | PDF | Favorites |
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