Kozlov, G.G.Malyshev, AndreyDomínguez-Adame Acosta, FranciscoRodriguez, A.2023-06-202023-06-201998-09-010163-182910.1103/PhysRevB.58.5367https://hdl.handle.net/20.500.14352/59364© 1998 The American Physical Society. Work at Russia was supported by the Russian Foundation for Basic Research (Project No. 95-03-09221). Work at Madrid was supported by CICYT under Project No. MAT95-0325. V.A.M. thanks Universidad de Salamanca, where this study was started, for hospitality.We study a one-dimensional Frenkel Hamiltonian with off-diagonal disorder, focusing our attention on the physical nature of the zero-energy peak of the density of states. The character of excitonic states (localized or delocalized) is also examined in the vicinity of this peak by means of the inverse participation ratio. It is shown that the state being responsible for the peak is localized. A detailed comparison of the nearest-neighbor approach with the long-range dipole-dipole coupling is performed.engjournal articlehttp://dx.doi.org/10.1103/PhysRevB.58.5367http://journals.aps.orgopen access538.9Anderson ModelLengthFísica de materiales