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.

Armchair graphene nanoribbons: PT-symmetry breaking and exceptional points without dissipation / Fagotti, M; Bonati, Claudio; Logoteta, Demetrio; Marconcini, Paolo; Macucci, Massimo. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - 83:24(2011), pp. 241406-1-241406-4. [10.1103/PhysRevB.83.241406]

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

LOGOTETA, DEMETRIO;
2011

Abstract

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.
2011
01 Pubblicazione su rivista::01a Articolo in rivista
Armchair graphene nanoribbons: PT-symmetry breaking and exceptional points without dissipation / Fagotti, M; Bonati, Claudio; Logoteta, Demetrio; Marconcini, Paolo; Macucci, Massimo. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - 83:24(2011), pp. 241406-1-241406-4. [10.1103/PhysRevB.83.241406]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1675110
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