An Improved Smart Meta-Superconductor MgB₂

Increasing and improving the critical transition temperature (T_C), current density (J_C) and the Meissner effect (H_C) of conventional superconductors are the most important problems in superconductivity research, but progress has been slow for many years. In this study, by introducing the p-n junction nanostructured electroluminescent inhomogeneous phase with a red wavelength to realize energy injection, we found the improved property of smart meta-superconductors MgB₂, the critical transition temperature T_C increases by 0.8 K, the current density J_C increases by 37%, and the diamagnetism of the Meissner effect H_C also significantly improved, compared with pure MgB₂. Compared with the previous yttrium oxide inhomogeneous phase, the p-n junction has a higher luminescence intensity, a longer stable life and simpler external field requirements. The coupling between superconducting electrons and surface plasmon polaritons may be explained by this phenomenon. The realization of smart meta-superconductor by the electroluminescent inhomogeneous phase provides a new way to improve the performance of superconductors.