Abstract
This chapter describes the size, shape and edge dependence of the electronic properties of graphene quantum dots obtained using the empirical tight-binding model. The effective mass extension of the TB model is discussed, including the effect of the magnetic field. The one-band TB model is extended to the \(sp^2\) TB model and spin-orbit coupling is introduced, followed by the Kane-Mele Hamiltonian and the spin Hall effect in nanoribbons. Triangular quantum dots and rings with zigzag edges as examples of quantum dots with broken sublattice symmetry and a shell of degenerate states at the Fermi level are described. Graphene ribbons and twisted graphene Möbius ribbons as examples of topological insulators where topology is introduced through geometry are discussed.
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Güçlü, A.D., Potasz, P., Korkusinski, M., Hawrylak, P. (2014). Single-Particle Properties of Graphene Quantum Dots. In: Graphene Quantum Dots. NanoScience and Technology. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-44611-9_4
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DOI: https://doi.org/10.1007/978-3-662-44611-9_4
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