Исследование многослойных структур на основе оксида европия совместным анализом рентгеновских методов
We demonstrate the possibility of determining a large group of physical properties of DLC films using only one group of methods based on X-ray interference studies. These include methods for determination of the film thickness, material density and roughness of the surface. We present the analysis of possibilities to use the method of the two-crystal X-ray spectrometer to evaluate internal stress and to deduce the modules of elasticity and thermal expansion coefficients of the film. It is shown that this method can be used for the in-situ control jf the film parameters during the film deposition in the technological chamber.
In this work authors presented new approach to investigation of multilayer heterostructures by joint calculation HRXRD and XRR data.
Magneto-fermionic condensate under study is a Bose-Einstein condensate of cyclotron spin-flip magnetoexcitons in a quantum Hall insulator. This condensate features unique properties such as millisecond range lifetime and hundreds of micrometers of propagation length. In this study, utilizing the photo-induced resonant reflection technique, we measured the exciton escape time. Finally, we estimated the exciton condensate propagation velocity as 25 m/s, which is much higher than a single particle propagation velocity. We also proposed a mechanism of exciton condensation.