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Vibrational properties of CdGa2S4

✍ Scribed by Doz. Dr. sc. H. Neumann; Dr. H. Sobotta; Dr. V. Riede; Doz. Dr. N. N. Syrbu; Prof. Dr. S. I. Radautsan


Publisher
John Wiley and Sons
Year
1984
Tongue
English
Weight
375 KB
Volume
19
Category
Article
ISSN
0232-1300

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✦ Synopsis


Polarization-dependent infrared reflectivity spectra of CdGazS, are measured a t 300 K in the wavenumber range from 180 to 500 cm-1. The analysis of the spectra yields three E and four R modes in this frequency range. The results are compared with previously published data and a final identification of the infrared active modes in CdGa,S, is proposed. It is shown that the two-phonon absorption spectra of CdGa,S, can be interpreted in terms of zone-centre two-phonon combination modes. The relation between the lattice vibrational properties of chalcopyrite and defect-chalcopyrite compounds is discussed.

Polarisationsabhangige Infrarot-Reflexionsspektren von CdGa,S, werden bei 300 K im Wellenzahlbereich von 180 bis 500 cm-l gemessen. Die Analyse der Spektren ergibt i n diesem Frequenzbereich drei Eund vier R-Moden. Die Ergebnisse werden mit fruher veroffentlichten Daten verglichen, und es wird eine endgiiltige Identifizierung der infrarotaktiven Moden des CdGa,S, vorgeschlagen. Es wird gezeigt, da13 die Zwei-Phononen-Absorptionsspektren des CdGa,S, durch Zwei-Phononen-Kombinationsmoden im Zentrum der Brillouin-Zone erkliirt werden konnen. Die Relation zwischen den Gitterschwingungseigenschaften von Chalkopyrit-und Ilefekt-Chalkopyrit-Verbindungen wird diskutiert.


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