The d-wave paradigm of unconventional superconductors

As famously introduced in the context of copper oxide superconductors, Cooper pairing ofelectrons through a d-wave order parameter constitutes a central departure from theconventional microscopic picture of phonon-mediated s-wave superconductivity. Fordecades, copper oxide superconductors remained the predominant arena for d-wavepairing. In recent years, however, d-wave superconductivity witnesses significant diversification in terms of materials realizations, such as Na-doped cobaltates, pnictides atstrong hole doping, and, most recently, infinite layer nickelates as well as strontiumruthenate. In this colloquium, I intend to provide an overview over recents developments,and to work out a future perspective on new d-wave superconductors