The propagation of excitation energy in perturbed crystals |
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Authors: | Miroslav Trlifaj |
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Institution: | (1) Institute of Physics, Gzechosl. Acad. Sci., Prague |
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Abstract: | The process of the propagation of excitation energy in perturbed dielectric crystals with a weak bond between the atoms having zero permanent dipole moment is studied. It is shown that on certain assumptions this process of propagation can be regarded as the motion of a Frenkel exciton in the electrostatic field of the defect. Frenkel's exciton can be characterized in this case as a neutral polarizable particle having induced dipole moment equal to the change in the induced dipole moment of the crystal during the excitation of one of its atoms.
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