Scaling of Level Statistics at the Disorder-Induced Metal-Insulator Transition

Abstract

The distribution of energy level separations for lattices of sizes up to 28$\times$28$\times$28 sites is numerically calculated for the Anderson model. The results show one-parameter scaling. The size-independent universality of the critical level spacing distribution allows to detect with high precision the critical disorder $W_c=16.35$. The scaling properties yield the critical exponent, $\nu =1.45\pm 0.08$, and the disorder dependence of the correlation length.

11 pages (RevTex), 3 figures included (tar-compressed and uuencoded using UUFILES), to appear in Phys.Rev. B 51 (Rapid Commun.)

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