Study of interfacial Josephson Junction in twisted BSCCO system

Twisted graphene systems are widely studied for the last few years, and it offer the platform for different exciting physics of strongly correlated systems, including Berry physics, superconductivity, etc. Twisted cuprate systems are relatively new, and many aspects of the interfacial JJ are still unexplored. We have studied the properties of the twisted interface of Bi2Sr2CaCu2O8+d (BSCCO). We found that the critical current of the twisted artificial Josephson Junction (AJJ) is quite different for opposite bias direction. This is known as Josephson diode effect (JDE). We found that diode asymmetry is maximum for 45-degree twisted interfacial JJ, as high as 60% at 20 K and ~ 10 % at 77 K. We have demonstrated diode asymmetry that can be tuned with a very small perpendicular magnetic field. As an application, we have used these diodes as half-wave rectifiers for square, triangular, and sinusoidal waveforms.