Superconducting Science and Technologies Focus Issue on Multicomponent Superconductivity

The scope of this issue is broader than just bulk multiband superconductors, and comprises other forms of multicomponent superconductivity, e.g. one found in artificial multicomponent coherent systems, or superconducting materials with multiple competing orders, a complexity certainly present in many copper-oxide, iron-arsenide, and heavy-fermion superconductors. Even elementary single-band superconductors are of interest, since they can become effectively multiband in samples confined to the nanoscale, in an almost unexplored regime of multiband superconductivity due to quantum confinement. Finally, we hope that this special issue will provide a snapshot of the current state of the understanding of multicomponent superconductivity in a wide range of materials, and a roadmap for further investigations in this booming field.