Mott Criterion
Encyclopedia
The Mott criterion describes the critical point
of the metal-insulator transition. The criterion is
Where
is the electron density of the material and 
the effective bohr radius.
If the criterion is satisfied the material becomes conductive (metal) and otherwise it will be an insulator.
Critical point (thermodynamics)
In physical chemistry, thermodynamics, chemistry and condensed matter physics, a critical point, also called a critical state, specifies the conditions at which a phase boundary ceases to exist...
of the metal-insulator transition. The criterion is
Where
is the electron density of the material and the effective bohr radius.If the criterion is satisfied the material becomes conductive (metal) and otherwise it will be an insulator.