"Artificial" superconductors. Superconducting phases in the MgxWO3 nanocomposite (x = 0.037; 0.125 - Tcx = 140; 280 K)

TL;DR

This paper explores the superconducting phases in MgxWO3 nanocomposites, demonstrating high critical temperatures and suggesting a potential for designing artificial superconductors through nonstoichiometric compounds.

Contribution

It introduces the concept of artificial superconductors using nonstoichiometric compounds and reports on the superconducting properties of MgxWO3 nanocomposites with high critical temperatures.

Findings

Superconductivity observed at Tc up to 280 K.

Superconducting phases depend on Mg content in nanocomposites.

Potential for tailoring superconductors via nonstoichiometric synthesis.

Abstract

Superconductivity of some compounds may be explained as resulting from Bose-Einstein condensation (BEC) of atomic electron pairs of divalent atoms or electron pairs of diatomic molecules made up of univalent atoms. "Artificial" superconductors of such types can be tailored using nonstoichiometric ompounds. Synthesis of "natural" stoichiometric superconductors is a much more complicated problem. In these cases, we have two methods of obtaining dilute metals in a state intermediate between the metal and the insulator.