Physics – Condensed Matter
Scientific paper
1994-07-22
Physics
Condensed Matter
REVTeX 3.0, 10 pages, 2 figures on request from FD-A (fimat02@emducms1.sis.ucm.es). Submitted to Phys Rev B. MA/UC3M/11/94
Scientific paper
10.1103/PhysRevB.51.878
Incoherent exciton dynamics in one-dimensional perfect lattices with traps at sites arranged according to aperiodic deterministic sequences is studied. We focus our attention on Thue-Morse and Fibonacci systems as canonical examples of self-similar aperiodic systems. Excitons progressively extend over the lattice on increasing time and, in this sense, they act as a probe of the particular arrangements of traps in each system considered. The analysis of the characteristic features of their time decay indicates that exciton dynamics in self-similar aperiodic arrangements of traps is quite close to that observed in periodic ones, but differs significatively from that corresponding to random lattices. We also report on characteristic features of exciton motion suggesting that Fibonacci and Thue-Morse orderings might be clearly observed by appropriate experimental measurements. In the conclusions we comment on the implications of our work on the way towards a unified theory of the orderings of matter.
Dominguez-Adame Francisco
Macia Enrique
Sanchez Angel
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