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We study the temperature dependence of persistent near-infrared absorption bands induced in single crystals of [Pt(en)₂][Pt(en)₂{Cl}₂$](${ClO}₄)₄, where en=ethylenediamine, by irradiation with 488-nm light. If the temperature is changed between 10 and 200 K in dark after irradiation, these bands show significant changes in the spectral position, line shape, and intensity. The behaviors of the mean energy and second and third moments of the A band are interpreted consistently in terms of a quantum-fluctuation model of solitons bound by shallow, periodic potential wells.
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Kuroda et al. (1994) studied this question.
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