We report on our thorough optical investigations of the Yb pnictide compounds, performed over a large photon-energy spectral range. From Kramers-Kronig analysis we obtain the complete excitation spectrum in terms of the optical dielectric functions. Applying a phenomenological harmonic-oscillator model we extract the unscreened plasma frequency and the resonance frequency of the transverse-optical-phonon mode. Our experimental findings suggest furthermore a d-4f electronic transition at about 0.2 eV, in agreement with high-energy electron-spectroscopy results. We also report on our Raman-effect measurements. Moreover, we compare our results with the reference material ScN and we discuss the influence of nonstoichiometry in the Yb pnictides.
OPTICAL AND RAMAN INVESTIGATION OF YB PNICTIDE COMPOUNDS
COMPAGNINI, Giuseppe Romano;
1993-01-01
Abstract
We report on our thorough optical investigations of the Yb pnictide compounds, performed over a large photon-energy spectral range. From Kramers-Kronig analysis we obtain the complete excitation spectrum in terms of the optical dielectric functions. Applying a phenomenological harmonic-oscillator model we extract the unscreened plasma frequency and the resonance frequency of the transverse-optical-phonon mode. Our experimental findings suggest furthermore a d-4f electronic transition at about 0.2 eV, in agreement with high-energy electron-spectroscopy results. We also report on our Raman-effect measurements. Moreover, we compare our results with the reference material ScN and we discuss the influence of nonstoichiometry in the Yb pnictides.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
