Experimental Test of Universality of the Anderson Transition

TL;DR

This paper experimentally verifies the universality of the 3D Anderson transition by testing multiple parameters and confirming that critical exponents are consistent and match theoretical predictions, supporting the universality hypothesis.

Contribution

It provides experimental evidence that the critical exponents of the Anderson transition are universal and independent of microscopic details, aligning with theoretical predictions.

Findings

Critical exponents are consistent across different parameters.

Average critical exponent matches numerical predictions.

Universality of the Anderson transition is experimentally confirmed.

Abstract

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 $2\sigma$) of these microscopic details, and the average value $1.63\pm0.05$ is in very good agreement with the numerically predicted value, $\nu = 1.58$.