Plasmon–phonon contribution in the permittivity of ZnP2 single crystals in FIR at low temperatures

How the phosphorus chains impact on the vibrational properties of diphosphides ZnP2 and CdP2 at low temperatures

“…The appearance of the reflectance spectra of the diphosphides ZnP 2 and CdP 2 that are presented in Figs. 1 and 2, is in good agreement with the data presented in [5][6][7] regarding the quantity of peaks in each spectrum, their height and width, which confirms the reliability of the obtained data. All the shown peaks exhibit a blue shift upon cooling the sample.…”

“…However, to obtain the complete picture of the vibrational properties of diphosphides, the temperature impact on the IR active modes should be also studied. Some preliminary data were reported in [5][6][7], however, the detailed analysis of behaviour inherent to IR active phonons in ZnP 2 and CdP 2 is still missing. Thus, to fill this gap, we performed the current research.…”

Influence of the local structure in phase-change materials on their dielectric permittivity

“…In the non-phase change covalently bonded semiconductor materials [11,12], the short-range order in the amorphous state is essentially the same as in the crystalline state. This we can illustrate on the example of non-phase-change material AgInTe 2 .…”

Optical phonon behaviors in ZnGeP2 single crystals from temperature dependent far-infrared reflectance spectra

“…The presented in [8] temperature dependences of the strength of oscillators were shown with linear trend line; however, experimental points show rather parabolic dependence. Moreover, the same dependences in ZnP 2 and CdP 2 reported in [9,10] are also not linear. The coefficient of thermal expansion of ZnGeP 2 is anisotropic and should have a different impact on the dispersion of the dielectric permittivity for E||c and E?c polarizations.…”