heterostructure*

We performed epitaxial growth of (110)-oriented YBa₂Cu₃O₇ / (110)-oriented PrBa₂(Cu_0.8Ga_0.2)₃O₇ heterostructure using pulsed laser based thin film deposition technique for the nanofabrication of Superconductor (S) / Insulator (I) / Superconductor (S) tunneling Josephson junction device which may operate with low cost and simple liquid nitrogen based cryogenic system and may provide high I_cR_n product (with I_c being the junction critical current and R_n the normal resistance). X-ray diffraction pattern (XRD) analysis, atomic force microscopy (AFM), electrical transport, and optical characterization studies were performed to check the orientation and thickness, surface morphology, critical temperature (T_C), electrical resistivity, proximity effect, and optical properties of the heterostructure. Here, we present experimental results on structural, electrical transport, and optial properties of the heterostructure.