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Information × Registration Number 0221U106131, 0120U104778 , R & D reports Title Topological phases of matter and excitations in Dirac materials, Josephson junctions and magnets popup.stage_title Head Sharapov Sergei H., Доктор фізико-математичних наук Registration Date 21-10-2021 Organization М.М.Bogolyubov Institute of Theoretical Physics of the National Academy of Sciences of Ukraine popup.description2  Published in the world's leading scientific journals 4 articles containing the following results: The behavior of a ring-shaped spin chain with antiferromagnetic ordering and strong tangential anisotropy in an external magnetic field has been studied. The Nernst and Ettinshausen effects are considered, and the thermodynamic origin of the relationship between the Nernst effect and magnetization currents is clarified. The properties of a new Dirac material - tetragraphene - have been studied. A comprehensive analytical and numerical analysis of electronic spectra and the emergence of a constant is performed undamped current in the Corbino disk of arbitrary size in a constant magnetic field. The study of the collapse of Landau levels in Dirac materials, in particular, in a radial electric field is continued. The influence of discreteness on the qubit read-out process using a fluxon in the Josephson transmission line is investigated. It is shown that by increasing the discreteness one can increase the sensitivity of the read-out process because it leads to the increase of the so-called fluxon delay time, i.e. the difference of the times required for the passage of the fluxon through the qubit in different states. Studies of linear excitations in Josephson arrays also continued. The dependence of the amplitude of Josephson plasmons on the external current is found in a quasi-one-dimensional array. Product Description popup.authors Bugaiko Oleksandr V Bukatova Daryna V Gusynin Valery Pavlovych Zolotaryuk Yaroslav O. Starodub Ivan O. Chernii Iurii A. Shubny Volodymyr O. popup.nrat_date 2021-10-21 Close