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Information × Registration Number 0221U103996, 0116U003052 , R & D reports Title Electronic ordering mechanisms and ways to improve critical parameters of the high temperature superconductors popup.stage_title Head Kordiuk Oleksandr A., Доктор фізико-математичних наук Registration Date 01-03-2021 Organization Institute of Metal Physics. G.V. Kurdyumov of the National Academy of Sciences of Ukraine popup.description2  Based on a critical analysis of a large number of experimental data, mainly obtained by angular separation photoelectron spectroscopy, an electronic phase diagram of ordered states of superconducting cuprates was constructed, according to which the spin antiferromagnetic order plays a major role in pseudogap formation. This led to the hypothesis that high-temperature superconductivity in both cuprates and iron-based superconductors is formed by the same electronic mechanism associated with the criticality of the Fermi surface topology - the proximity of the Fermi surface to the Lifshitz topological transition. For the first time in the world, Josephson's contact was made on iron-containing superconductors, which, in particular, allowed to obtain the long-awaited "phase-sensitive" confirmation of the superconducting state with a variable superconducting sign (so-called s + - superconductivity) in these materials. The research was conducted at the level of world standards using the latest experimental techniques, such as synchrotron ARPES, and with the involvement of international cooperation. The obtained results are important both for fundamental solid state physics (detection of the connection of electronic structure with electronic ordering and superconductivity, improvement of theoretical ideas about the influence of nanoscale point defects on the value of surface resistance in the microwave range and model model for high-frequency response of Apricot vortices in mixed state 3D-anisotropic superconductor, detection of two-band nature of superconductivity in MoRe alloy and two-dimensional anisotropy of the pinning constant of Apricot vortices) and for practical application of VTNP (detection of ways to increase critical parameters of superconductors, namely critical current density and critical temperature. , development of the concept of a single-photon detector based on a superconducting qubit). Product Description popup.authors Atamanenko Olha M Havrysh Ivan H Dukhnevych Mykolay M Kalenyuk Oleksiy A. Kasatkin Oleksandr L. Makivsʹkyy Oleksandr V Matsuy Volodymyr I Moskalyuk V'yacheslav O Plyushchay Oleksandr I Suvorov Oleksandr Yu Flis Viktor S Futymskyy Serhiy I Tsvitkovsʹkyy Vadym P Shapovalov Andrii P. Shaternik Volodymyr Ye Shnurkov Volodymyr I. popup.nrat_date 2021-03-01 Close