Plasmon - ionized impurity - phonon interaction in PbTe doped with Niстатья
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Дата последнего поиска статьи во внешних источниках: 4 октября 2013 г.
Аннотация:Vibrational properties of PbTe single crystals doped with Ni are determined using far - infrared spectroscopy in wide temperature range. Far - infrared reflection spectra were analyzed using a fitting procedure based on the modified plasmon - ionised impurity - phonon interaction model. Together with the strong coupling we obtained three local modes of Ni at about 130, 165 and 190 cm(-1), which correspond to the impurity atoms in different valence states. The positions of these modes depend on the impurity center charge, while their intensities depend on the temperature and Ni concentration.