We consider a single-layer graphene nanoribbon with armchair edges and with a longitudinally constant external potential, pointing out that it 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.
|Autori:||Fagotti M; Bonati C; Logoteta D; Marconcini P; Macucci M|
|Titolo:||Armchair graphene nanoribbons: PT-symmetry breaking and exceptional points without dissipation|
|Anno del prodotto:||2011|
|Digital Object Identifier (DOI):||10.1103/PhysRevB.83.241406|
|Appare nelle tipologie:||1.1 Articolo in rivista|