Universality and Critical Behavior at the Mott Transition

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Science  03 Oct 2003:
Vol. 302, Issue 5642, pp. 89-92
DOI: 10.1126/science.1088386

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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.

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