RT Journal Article
T1 Frenkel excitons in random-systems with correlated gaussian disorder
A1 Domínguez-Adame Acosta, Francisco
AB Optical-absorption spectra of Frenkel excitons in random one-dimensional  systems are presented. Two models of inhomogeneous broadening, arising from a Gaussian distribution of on-site energies, are considered. In one case the on-site energies are uncorrelated variables whereas in the second model the on-site energies are pairwise correlated (dimers). We observe a red shift and a broadening of the absorption line on increasing the width of the Gaussian distribution. In the two cases we And that the shift is the same, within our numerical accuracy, whereas the broadening is larger when dimers are introduced. The increase of the width of the Gaussian distribution leads to larger differences between uncorrelated and correlated disordered models. We suggest that this higher broadening is due to stronger scattering effects from dimers.
PB American Physical Society
SN 1098-0121
YR 1995
FD 1995-05-01
LK https://hdl.handle.net/20.500.14352/59377
UL https://hdl.handle.net/20.500.14352/59377
LA eng
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NO © 1995 The American Physical Society.The author thanks A. Sanchez and E. Macia for illuminating conversations. This work was supported by UCM under Project No. PR161/93-4811.
NO UCM
DS Docta Complutense
RD 30 abr 2024