Dielectric tensor of monoclinic Ga2O3 single crystals in the spectral range 0.5–8.5 eV

Anisotropic paramagnetism of monoclinic Nd2Ti2O7 single crystals.

The anisotropic paramagnetism and specific heat in Nd(2)Ti(2)O(7) single crystals are investigated. The angular dependence of the magnetization and Weiss temperatures show the dominant role of the crystal field effect in the magnetization. By incorporating the results from the diluted samples, contributions to the Weiss temperature from exchange interactions and crystal field interactions are i...

Polarization-Based Calculation of the Dielectric Tensor of Polar Crystals

The modern quantum theory of polarization in dielectrics has been formulated only in recent years [1]. This development has opened a new era in the first principles theory of ferroelectricity and pyroelectricity [2]. The new theory has been used successfully to calculate, in a well defined and computationally efficient way, the macroscopic polarization changes induced by perturbations other tha...

Dielectric properties of lithium triborate single crystals

Periodic absorption in monoclinic crystals

Optical anisotropy in the VUV range : experimental studies and dielectric constants of monoclinic GaTe

2014 Normal and oblique incidence reflectances of GaTe have been measured in the 2.5 to 26 eV range using polarized synchrotron radiation. We have deduced 3 complex refractive indices, relative to 3 different crystallographic directions by means of a new method consistent with the Kramers-Kronig relations. We have verified that the electronic transitions in the 20 eV region, from the 3d Ga leve...