Competing orders

Several would-be ground states close in energy — the source of rich phase diagrams and intertwined order.

Every topic that illustrates this idea, drawn from across all subjects.

• Cuprates and the Mott Problem Mott Physics in Correlated Lattices Why high-temperature superconductivity forced condensed-matter physics to take strong electron correlation seriously — and why the story begins with an insulator that band theory says should be a metal.