Spin-orbit gap of graphene: First-principles calculations
By Yugui Yao, F. Ye, Xiao-Liang Qi, Shoucheng Zhang, Z. Fang. 2006
715 citations recorded by the source corpus.
Even though graphene is a low-energy system consisting of a two-dimensional honeycomb lattice of carbon atoms, its quasiparticle excitations are fully described by the (2+1)-dimensional relativistic Dirac equation. In this paper we show that, while the spin-orbit interaction in graphene is of the order of 4 meV, it opens up a gap of the order of 10(-3) meV at the Dirac points. We present a first-principles calculation of the spin-orbit gap, and explain the behavior in terms of a simple tight-binding model. Our result also shows that the recently predicted quantum spin Hall effect in graphene can occur only at unrealistically low temperature.
Subfields: Atomic and Molecular Physics, and Optics, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/cd67873f33565c28ce867addf8e8c684595789ea
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In Atomic and Molecular Physics, and Optics
In Materials Chemistry
Citations in the corpus
- Colloquium : Spintronics in graphene and other two-dimensional materials (2019, background): “(Abdelouahed et al., 2010; Gmitra et al., 2009; Konschuh et al., 2010; Yao et al., 2007).”
- Topological node-line semimetal in three-dimensional graphene networks (2014, background): “The first condition is naturally satisfied in graphene, because its SOC strength is negligible (∼10−3 meV) [5].”
- Engineering a robust quantum spin Hall state in graphene via adatom deposition (2011, neutral): “[9] Yugui Yao, Fei Ye, Xiao-Liang Qi, Shou-Cheng Zhang,”