[en] Top quark production in the process e"+e"- → t anti t at a future linear electron positron collider with polarised beams is a powerful tool to determine indirectly the scale of new physics. The presented study, based on a detailed simulation of the ILD detector concept, assumes a centre-of-mass energy of √(s) = 500 GeV and a luminosity of L = 500 fb"-"1 equally shared between the incoming beam polarisations of P_e_"-, P_e_"+ = ±0.8, -+0.3. Events are selected in which the top pair decays semi-leptonically and the cross sections and the forward-backward asymmetries are determined. Based on these results, the vector, axial vector and tensorial CP conserving couplings are extracted separately for the photon and the Z"0 component. With the expected precision, a large number of models in which the top quark acts as a messenger to new physics can be distinguished with many standard deviations. This will dramatically improve expectations from e.g. the LHC for electro-weak couplings of the top quark. (orig.)

[en] Highlights: • Pressure effects on optical properties of CCTO thin films were evaluated. • Pressure treatment increased the photoluminescence emission, promoting a red shift. • The red shift observed in the PL emission can be justified by a decrease in the Egap. • Pressure treatment caused structural defects that lead to a decrease in band gap. -- Abstract: CCTO thin films were deposited on Pt(1 1 1)/Ti/SiO₂/Si substrates using a chemical (polymeric precursor) and pressure method. Pressure effects on CCTO thin films were evaluated by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM) and optical properties which revealed that a pressure film (PF) is denser and more homogeneous than a chemical film (CF). Pressure also causes a decrease in the band gap and an increase in the photoluminescence (PL) emission of CCTO films which suggests that the pressure facilitates the displacement of Ti in the titanate clusters and the charge transference from TiO₆ to [TiO₅V₀^z], [TiO₅V₀^z] to [CaO₁₁V₀^z] and [TiO₅V₀^z] to [CuO₄]^x