The exciton motion on a chain with alternating site energies (model A) or intersite interactions (model B) is studied analytically. Exact solutions for the amplitude propagators in two systems are obtained explicitly, from which the effects of the site-energy mismatch and the hopping disturbance on the diffusing behavior of the moving exciton are displayed. The symmetry properties for the amplitude propagators in the real space are also given.
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References
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Footnotes
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Funding
The project supportedin part by National Natural Science Foundationof China and the Grant LWTZ-1298 of The Chinese Academy of Sciences
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