Zero-crossing Shapiro steps in focused-ion-beam-tailored high-$T_c$ superconducting microstructures

Myung-Ho Bae, R. C. Dinsmore, M. Sahu +2

Microwave response of S-shaped Bi${}_2$Sr${}_2$CaCu2O${}_{8+x}$ (Bi-2212) micron-scale samples, in which the supercurrent was forced to flow perpendicular to the crystal layers, was inve…