Armchair graphene nanoribbons: PT-symmetry breaking and exceptional points without dissipation

Details Armchair graphene nanoribbons: PT-symmetry breaking and exceptional points without dissipation Armchair graphene nanoribbons: PT-symmetry breaking and exceptional points without dissipation

2011-02-10

arxiv.org/abs/1102.2129v3

Phys. Rev. B 83, 241406(R) (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 2 eps figures

Scientific paper

10.1103/PhysRevB.83.241406

We consider a single layer graphene nanoribbon with armchair edges in a longitudinally constant external potential and point out that its transport properties can be described by means of an effective non-Hermitian Hamiltonian. We show that this system has some features typical of dissipative systems, namely the presence of exceptional points and of PT-symmetry breaking, although it is not dissipative.

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