Optical phonons in CuAlS2 |
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Authors: | WH Koschel V Hohler A Räuber J Baars |
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Institution: | Institut für Angewandte Festkörperphysik der Fraunhofer-Gesellschaft, (7800) Freiburg, Germany |
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Abstract: | The optical phonons at k=0 of CuAlS2 have been investigated by Raman scattering, infrared reflectivity and absorption measurements from 50 to 1000 cm-1 at T=300 K. Eleven of the thirteen expected optically active phonons have been observed and identified with respect to their symmetry types. The phonon frequencies appear in a range from 498 to 76 cm-1 with predominant polar modes at 445 and 266 cm-1. The dielectric dispersion for E ⊥ c and E ∥ c has been determined by Kramers-Kronig integrations. |
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