Infrared Lattice Vibrations of TI3AsS4

NEUMANN, H.; SOBOTTA, H.; RIEDE, V.; KAMBA, S.; SYRBU, N. N.; GOLOVEI, M. I.

Infrared Lattice Vibrations of TI3AsS4

NEUMANN, H.; SOBOTTA, H.; RIEDE, V.; KAMBA, S.; SYRBU, N. N.; GOLOVEI, M. I.

URI: https://doi.org/10.1002/crat.2170270716
http://repository.utm.md/handle/5014/12347

Date: 1992

Abstract:

Infrared reflectivity spectra of TI3AsS4 single crystals are measured at room temperature in the wavenumber range from 30 to 4000 cm−1 for the polarization directions E‖ c and E ‖ a. An analysis of the spectra with the Kramers-Kronig method reveals 10 infrared active modes for each of the polarization directions. On the basis of theoretical estimates the modes due to TI-S and As–S bond vibrations are identified.