The remarkable underlying ground states of cuprate superconductors

Understand

Cuprates exhibit exceptionally strong superconductivity.

• To understand why, it is essential to elucidate the nature of the electronic interactions that cause pairing.
• Superconductivity occurs on the backdrop of several underlying electronic phases, including a doped Mott insulator at low doping, a strange metal at high doping, and an enigmatic pseudogap phase in between -- inside which a phase of charge-density-wave order appears.
• In this Article, we aim to shed light on the nature of these remarkable phases by focusing on the limit as $T \to 0$, where experimental signatures and theoretical statements become sharper.