HIGH-TEMPERATURE SUPERCONDUCTORS MADE BY METAL HETEROSTRUCTURES AT THE ATOMIC LIMIT

摘要

We describe superconductors with a high critical temperature formed by heterostructures at the atomic limit that can be realized artificially by molecular beam epitaxy, sputtering, lithography, chemical synthesis, electrochemical deposition or other similar technologies, made by a plurality of first portions of a superconducting metallic material forming a lattice of substantially equal elements with constant period μp, at least in a first direction (y), and a plurality of second portions formed by a material with different electronic structure from that of the first portions, intercalated to the first portions to realize the separation between said first portions; the heterostructure is characterized by the fact that the plurality of first portions have a size (L) and a period (μp) as to satisfy the condition for the shape resonance condition for the electrons at the Fermi level and the plurality of second portions have a size (W) smaller or of the order of the superconducting Pippard coherence length κ0 of the superconducting material forming the first portions. Fig. 2.