Localized self-trapping in the two-dimensional discrete molecular lattice with the interaction between Frenkel excitons and phonons |
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Authors: | Xu Quan and Tian Qiang |
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Institution: | Department of Physics, Daqing Normal University, Daqing 163712, China; Department of Physics, Beijing Normal University, Beijing 100875, China |
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Abstract: | We investigate the interactions of lattice phonons with Frenkel
exciton, which has a small radius in a two-dimensional discrete
molecular lattice, by the virtue of the quasi-discreteness
approximation and the method of multiple-scale, and obtain that the
self-trapping can also appear in the two-dimensional discrete molecular
lattice with harmonic and nonlinear potential. The excitons' effect
on the molecular lattice does not distort it but only
causes it to localize which enables it to react again through phonon
coupling to trap the energy and prevent its dispersion. |
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Keywords: | self-trapping Frenkel exciton two-dimensional discrete molecular lattice phonon |
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