Stratification and superconducting droplets in high-Tc superconductors
Gorbatsevich A. A. , Kopaev Yu. V. , Tokatly I. V.
A model describing a stratification of a high-Tc superconductor into metallic and insulating phases is proposed. The onset of a superconducting order might be the reason for the stratification. It would then become possible to explain the appearance in a weak magnetic field, of a nonzero resistance in a Ba, _ x Kx Bi03 sample which is a superconductor according to the Meissner effect. The resistance which appears is higher than the resistance of the normal phase.