Vibrational properties of 2H-PbI$_2$ semiconductors studied via Density Functional Theory calculations
Résumé
Density Functional Theory is used to study the vibrational properties of 2H-PbI$_2$ semiconductor. The Born charge tensors are determined. Calculated phonon frequencies at the Brillouin zone center are compared to Raman scattering and IR absorption measurements. The computed Raman spectra show a good agreement with available experimental data. The simulated phonon dispersion curves are compared with triple-axis neutron scattering measurements.
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