Dynamical vortex transitions in a gate-tunable two-dimensional Josephson junction array
C. G. L. Bøttcher, Fabrizio Nichele, Javad Shabani, C. J. Palmstrøm, C. M. Marcus
Abstract
The sudden depinning of vortices with increasing current through a super-semihybrid Josephson junction array results in a burst of differential resistance at integer and half-integer peaks of critical current. A striking feature is the split feature at $f=0$, indicating the absence of vortices at precisely zero field. The flat-topped portion at $f=1/2$ and the slanted top part at $f=1$ also reveal features of how the dynamical transition occurs.
Topics & Concepts
Josephson effectVortexCondensed matter physicsPhysicsCritical currentJosephson energyCurrent (fluid)Integer (computer science)Differential (mechanical device)SuperconductivityComputer scienceMechanicsProgramming languageThermodynamicsPhysics of Superconductivity and MagnetismQuantum and electron transport phenomenaCold Atom Physics and Bose-Einstein Condensates