Mottness
A phase diagram and a structure diagram illustrating the conditions
of a Mott insulator. The phase diagram to the left shows how ceramic
cuprates can exist in different forms with widely varying conducting
properties depending on the temperature or degree of doping. These states
include a conventional conductor, a superconductor, or insulator. The
structure diagram shows the arrangements of copper, oxygen, yttrium,
and barium atoms in a typical cuprate material. (Courtesy, Philip Phillips)
