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Tight-binding theory of the spin-orbit coupling in graphene

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Konschuh, Sergej ; Gmitra, Martin ; Fabian, Jaroslav
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Date of publication of this fulltext: 06 Dec 2011 06:56


The spin-orbit coupling in graphene induces spectral gaps at the high-symmetry points. The relevant gap at the Γ point is similar to the splitting of the p orbitals in the carbon atom, being roughly 8.5 meV. The splitting at the K point is orders of magnitude smaller. Earlier tight-binding theories indicated the value of this intrinsic gap of 1 μeV, based on the σ−π coupling. All-electron ...


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