Universality and Critical Behavior at the Mott Transition
P. Limelette,1*
A. Georges,1,2
D. Jérome,1
P. Wzietek,1
P. Metcalf,3
J. M. Honig3
We report conductivity measurements of Cr-doped V
2O
3 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.
2 Laboratoire de Physique Théorique de l'Ecole Normale Supérieure (CNRS, U.M.R. 8549) 24, rue Lhomond, 75231 Paris Cedex 05, France.
3 Department of Chemistry, Purdue University, West Lafayette, IN 47907, USA.
* To whom correspondence should be addressed. E-mail: limelette{at}lps.u-psud.fr
