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Information × Registration Number 0221U100508, 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 05-01-2021 Organization Bogolybov Institute for Theoretical Physics of NASU popup.description2  In 2020, 2 articles were sent to print and posted on the arXiv.org server. The study of Landau level collapse for the edge states in Dirac materials, e.g. graphene, silicene nanoribbons is going on. The role of higher order van How singularities and the Dirac spectrum in the orbital favorability of tetragrafen has been studied, and the possibility of a diamagnetism-paramagnetism phase transition has been established. The plasmon spectrum for quasi-one-dimensional ladder-like arrays of Josephson junctions is obtained. In this spectrum there is a flat (dispersion-free) degenerate zone with a frequency equal to the Josephson plasma. The application of external current removes this degeneration. The visualization of the Nernst effect using the ideal reversible thermodynamic cycle in the coordinates of the number of particles - chemical potential is proposed. The Ettingshausen effect is also considered using the inverse thermodynamic cycle. The study of phase transitions in curved one-dimensional antiferromagnetic systems in an external magnetic field is going on. Product Description popup.authors Borysenko Elisaveta A Bukatova Daryna V Gusynin Valery P Zolotaryuk Yaroslav O Nimyi Igor O Starodub Ivan O Shubnyi Volodymir O popup.nrat_date 2021-03-17 Close