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.
Received: 19 March 2009
Revised: 22 April 2009
Accepted manuscript online:
Fund: Project supported by the National
Natural Science Foundation of China (Grant No 1057400), and the
Natural Science Foundation of
Heilongjiang Province of China (Grant No A200506).
Cite this article:
Xu Quan(徐权) and Tian Qiang(田强) Localized self-trapping in the two-dimensional discrete molecular lattice with the interaction between Frenkel excitons and phonons 2009 Chin. Phys. B 18 3940
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