RT Journal Article
T1 Delocalized vibrations in classical random chains
A1 Domínguez-Adame Acosta, Francisco
A1 Maciá Barber, Enrique Alfonso
A1 Sánchez, Angel
AB Normal modes of one-dimensional disordered chains with two couplings, one of them assigned at random to pairs in an otherwise perfect chain, are investigated. We diagonalize the dynamical matrix to find the normal modes and to study their spatial extent. Multifractal analysis is used to discern clearly the localized or delocalized character of vibrations. In constrast to the general viewpoint that all normal modes in one dimensional random chains are localized, we find a set of extended modes close to a critical frequency, whose number increases with the system size and becomes independent of the defect concentration.
PB American Physical Society
SN 0163-1829
YR 1993
FD 1993-09-01
LK https://hdl.handle.net/20.500.14352/59400
UL https://hdl.handle.net/20.500.14352/59400
LA eng
NO © 1993 The American Physical Society.We are indebted to Sergey A. Gredeskul for helpful discussions. We also thank the Comision Interministerial de Ciencia y Tecnologia of Spain for financial support under Project No. MAT90-0544 and the Universidad Carlos III de Madrid for computer facilities.
NO Comision Interministerial de Ciencia y Tecnologia of Spain
DS Docta Complutense
RD 12 may 2025