Possible universal cause of high-Tc superconductivity in different metals
M. Ya. Amusia+*, V. R. Shaginyan
+The Racah Institute of Physics, the Hebrew University, 91904 Jerusalem, Israel
*A. F Ioffe Physical-Technical Institute RAS, 194021 St. Petersburg, Russia
Petersburg Nuclear Physics Institute RAS, 188300 Gatchina, Russia
PACS: 71.27.+a, 74.20.Fg, 74.72.-h
Abstract
Using the theory of the high temperature superconductivity based
on the idea of the fermion condensation quantum phase transition
(FCQPT), we show that neither the d-wave pairing symmetry, nor
the pseudogap phenomenon, nor the presence of the Cu-O2
planes are of decisive importance for the existence of the
high-Tc superconductivity. We analyze recent experimental data
on this type of superconductivity in different materials and show
that these facts can be understood within the theory of
superconductivity based on the FCQPT. The latter can be considered as
a universal cause of the high-Tc superconductivity. The main
features of a room-temperature superconductor are discussed.