Aluminum Granules Against Magnetic Fields
A regular superconductor and a magnetic field are like water and fire: the field tears apart the electron pairs that carry current without resistance.
A Superconducting Bridge of Platinum and Germanium
A bridge where pedestrians and cyclists flow together without getting in each other's way. That's roughly how hybrid systems of superconductors and semiconductors work: the former carry current without loss, the latter control that current.