The electronic properties of a strongly correlated heterostructure consisting of $t\text{−}J$ layer and metallic layer have been investigated by using the Gutzwiller projected mean-field approximation. Considering the proximity effect due to the large pseudogap energy scale of $t\text{−}J$ layer, a large superconducting gap could be induced on the metallic layer. This enhanced superconducting gap may be even larger than that of the $t\text{−}J$ layer. Related physical quantities including spectral functions and density of states are obtained. The consequences of these results on experiments are discussed.

• Received 9 May 2010

DOI:https://doi.org/10.1103/PhysRevB.82.174502