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Information × Registration Number 0216U005852, 0111U002162 , R & D reports Title Interplay of superconductivity and charge- or spin-density waves in inhomogeneous materials. popup.stage_title Head Gabovich A.M., Registration Date 29-02-2016 Organization Institute of physics NASU popup.description2 This work was aimed at a theoretical and experimental study of the influence of charge density waves (CDWs) on the properties of superconductors with d-symmetry of its superconducting order parameter. In particular, the phase diagram was calculated in the plane of the system parameters for the objects concerned. Areas were revealed where the so-called reentrance of dielectric order parameter can be observed. The theory of stationary Josephson current in tunnel junctions invloving superconductors with d- symmetry and CDWs was created. It was shown that the relevant modifications in the angular and temperature dependences of the current can identify the availability of CDWs. The theory of quasi-particle current in symmetric and non-symmetric tunnel junctions containing the objects concerned was developed. The classification of current-voltage characteristic (CVC) features was made and the temperature CVC evolution depending on superconductor parameters was studied. In the non-symmetric case, CVCs were calculated taking into account the averaging of CDW parameters according to experiments for disordered cuprates. The theory of image forces for dipoles at the interface between the vacuum (the vapor phase) and a condensed medium was developed, and model calculations for the HF molecule near graphene were carried out. The calculation results are in accordance with the qualitative quantum-chemical calculations using the molecular dynamics methods. Measurement of CVCs for symmetric tunnel junctions formed by the Nb3Sn superconductor revealed features that can be explained as a manifestation of CDWs in this superconductor. Product Description popup.authors Бойчук Валерій Миколайович Войтенко Олександр Іванович Габович Олександр Маркович popup.nrat_date 2020-04-02 Close