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 (Tc) 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 Tc could attain the level of 300 K at atmospheric pressure.