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Optical phonons in CuAlS2

Authors
Journal
Solid State Communications
0038-1098
Publisher
Elsevier
Publication Date
Volume
13
Issue
7
Identifiers
DOI: 10.1016/0038-1098(73)90420-1
Disciplines
  • Physics

Abstract

Abstract The optical phonons at k=0 of CuAlS 2 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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