Physics – Condensed Matter – Disordered Systems and Neural Networks
Scientific paper
1999-08-30
Physics
Condensed Matter
Disordered Systems and Neural Networks
18 pages, 3 figues, REVTeX, to appear in Physical Review B
Scientific paper
10.1103/PhysRevB.60.14140
We analyze the effects of intersite energy correlations on the linear optical properties of one-dimensional disordered Frenkel exciton systems. The absorption line width and the factor of radiative rate enhancement are studied as a function of the correlation length of the disorder. The absorption line width monotonously approaches the seeding degree of disorder on increasing the correlation length. On the contrary, the factor of radiative rate enhancement shows a non-monotonous trend, indicating a complicated scenario of the exciton localization in correlated systems. The concept of coherently bound molecules is exploited to explain the numerical results, showing good agreement with theory. Some recent experiments are discussed in the light of the present theory.
Dominguez-Adame Francisco
Malyshev Victor A.
Rodirguez A.
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