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Electronic spectra, topological states, and impurity effects in graphene nanoribbons

Pogorelov, Yu. G. ; Kochan, D. ; Loktev, V. M.


We consider the finite ribbons of graphene with two principal orientations, zigzag and armchair, of their edges to study in detail impurity effects on their edge states. An alternative to the known description of quasiparticle states in terms of transversal standing waves is proposed in the recurrence relations for their spectra vs discrete numbers of atomic chains in the ribbon, permitting to ...


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