Universality and critical behavior at the Mott transition.

Limelette, P; Georges, A; Jérome, D; Wzietek, P; Metcalf, P; Honig, J M · Science · 2003

basic_science · Level V

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Abstract

We report conductivity measurements of Cr-doped V2O3 using a variable pressure technique. The critical behavior of the conductivity near the Mott insulator to metal critical endpoint is investigated in detail as a function of pressure and temperature. The critical exponents are determined, as well as the scaling function associated with the equation of state. The universal properties of a liquid-gas transition are found. This is potentially a generic description of the Mott critical endpoint in correlated electron materials.