Possible higher temperature superconductivity in the modulation-doped superlattice structure of cuprate superconductors

We design a new structure for a cuprate superconductor indicating the possibility of higher temperature superconductivity using our recently proposed composite fermions theory. It is constructed with modulation-doped superlattice structures, which are often used in the design of semiconductor superlattice devices. The superconductive critical temperature ($T_c$) was calculated in the superlattice structures of the superconductor in which the optimal doped CuO₂ layer was sandwiched between two less-doped CuO₂ layers. We find that if these structures could be realized in a cuprate superconductor such as Bi₂Sr₂Ca₂Cu₃O₁₀ or HgBa₂Ca₂Cu₃O₉, the highest $T_c$ could attain the level of 300 K at atmospheric pressure.