Experimental Test of Universality of the Anderson Transition

We experimentally test the universality of the Anderson three dimensional metal-insulator transition. Nine sets of parameters controlling the microscopic details of this second order phase transition have been tested. The corresponding critical exponents are independent (within $2σ$) of these microscopic details, and the average value $1.63\pm0.05$ is in very good agreement with the numerically predicted value, $ν= 1.58$.

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