Effects of Capacitance on Phase Dynamics of $\hbox{YBa}_{2}\hbox{Cu}_{3}\hbox{O}_{7-x}$ Josephson Junctions

We report on YBa
₂
Cu
₃
O
_7-x
biepitaxial grain boundary Josephson junctions (JJs) demonstrating significant tunability of their circuital parameters. We show how the enhanced control of the junction properties, and particularly of the capacitance, leads to advances in the understanding of phase dynamics of high-critical-temperature superconductor JJs and potentially of their intrinsic dissipation mechanisms.