Far infrared study of local impurity modes of Gd doped PbTe
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AuthorsNikolić, Pantelija M.
Paraskevopoulos, Konstantinos M.
Vujatović, Stevan S.
Nikolić, Maria Vesna
Bojičić, Aleksandar I.
Zorba, Triantafyllia T.
Article (Published version)
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Single crystal samples of lead telluride doped with Gd were grown using the Bridgman method. Far infrared reflectivity spectra in the temperature range from 10 K to 300 K were measured. The experimental diagrams were numerically analyzed using a fitting procedure based on the plasma-phonon interaction model and the optical parameters were determined, while two local modes of gadolinium were observed at about 155 cm-1 and 230 cm-1 at room temperature. The origin of these local vibrational impurity modes was discussed. © 2008 Elsevier B.V. All rights reserved.
Keywords:far infrared reflectivity / rare earth impurity / semiconductors
Source:Materials Chemistry and Physics, 2008, 112, 2, 496-499