Acta Physica Polonica B

Vol. 32, No. 2, February 2001, page 467


Scaling Conductance on Random Fractal

A. Kolek, G. Haldas, A.W. Stadler

In the paper we use numerical simulations to show that superlocalization of electronic wave functions takes place on fractal objects also for energies E from the band. Finite size scaling of conductance g versus system size L reveals that  <ln g> scales as Ld\phi . The values of localization exponent d\phi we found in 2D are 1.138(3) for the state in the middle of the band E=0.5t, and 1.144(3) for the state near the lower band edge E=-3.5t. These values are in good agreement with the conjecture d\phi =\zeta l, where \zeta l is the chemical length exponent.

PACS numbers: 72.15.Rn, 73.23.--b


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