Abstract
Infrared reflectivity and absorption spectra of CuInS2 are measured in the wave-number range from 180 to 700cm−1for the polarization directions perpendicular and parallel to the tetragonalc axis of the crystals. The optical dispersion parameters of the fundamental lattice modes are determined for both polarization directions and compared with previously published data. All the structures observed in the absorption spectra in the wavenumber range beyond the fundamental lattice bands can be interpreted in terms of two-phonon combination modes due to zone-centre phonons.
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Neumann, H., Kissinger, W., Sobotta, H. et al. Infrared study of the lattice vibrations in CuInS2 . Czech J Phys 34, 69–77 (1984). https://doi.org/10.1007/BF01590482
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DOI: https://doi.org/10.1007/BF01590482