Seminarium Międzynarodowego Laboratorium Silnych Pól Magnetycznych i Niskich Temperatur PAN
ul. Gajowicka 95, sala seminaryjna (nowy budynek, II piętro)
From Cu-SC to Fe-SC and back: on common correlation of Fermi surface topology and high temperature superconductivity
Alexander Kordyuk
Institute of Metal Physics, Kyiv, Ukraine
An empirical approach to the problems of the pseudogap and electronic ordering, their correlation and relation to superconductivity in quasi-2D superconductors is reviewed focusing on recent ARPES results. The comparison be-tween cuprate superconductors (Cu-SC) and transition metal dichalcogenides has appeared to be useful tool to disentangle the pseudogap components and to conclude about their origins: CDW, SDW, and Mott localization. The SDW and superconductivity competes for the phase space but, on the other hand, the SDW-reconstructed Cu-SC share with the iron based superconductors (Fe-SC) the empirical correlation between the Tc maximum and the proximity of the Fermi surface to the topological Lifshitz transition. This suggests that the critical Fermi surface topology could be a key feature for the high temperature superconductivity.
