2011/02/28 by Maurizio Fagotti, Claudio Bonati, Demetrio Logoteta +2
Mathematics · Physics and Astronomy · #Quantum Mechanics and Non-Hermitian Physics #Quantum chaos and dynamical systems #Topological Materials and Phenomena #cond-mat.mes-hall #math-ph #math.MP #quant-ph
paper · pdf · doi:10.1103/physrevb.83.241406
published as Phys. Rev. B 83, 241406(R) (2011) · 5 pages, 2 eps figures
openalex publication_date 2011/06/24 · arxiv created 2011/06/25 · arxiv updated 2011/06/28 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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.