Origin of the temperature-induced redshift of the charge transfer band of GdVO_4
作者： Shaoshuai Zhou , Changkui Duan , Mei Wang
DOI: 10.1364/OL.42.004703
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摘要: The charge transfer band (CTB) of the VO43− groups in vanadates shifts to longer wavelengths with increasing temperature. The origin of this temperature-induced redshift was explored by studying the temperature-dependent excitation and emission spectra of GdVO_4 ranging from 300 to 480 K. The influences of the thermal population and the decline of the charge transfer gap on the spectral shift were analyzed using the configurational coordinate diagram. We conclude that the thermal population of vibrational …
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