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- W1983402726 abstract "Abstract The conductance in the quantum site-percolation on simple cubic lattice is numerically studied using Landauer-Buttiker formalism. Binary distribution of site energies P ( e n ) = pδ ( e n ) + (1 − p ) δ ( e n − ∞) is assumed with p (1 − p ) being concentration of metallic (insulating) sites. The metal-insulator transition is defined as such point p q for which dimensionless conductance g changes its dependence on linear size L of the system from g exp( −L ξ loc ) for p p q to g L for p p q . The critical conductance at the metal-insulator transition is estimated as g c ≡ g ( p q ) It is found that g c expressed in e 2 h units decreases from 1 at the center of each subband ( E U = 0 ) down to 0.002 in the vicinity of the subband edge ( E U = 6 ). This, almost three orders of magnitude, variation of the critical conductance vs electron Fermi energy E can be compared with the range 0.02–10.0 obtained for g c by Kaveh and Mott. 2 They have concluded that critical conductance is not universal. Our data support this conclusion." @default.
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- W1983402726 date "1998-05-01" @default.
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- W1983402726 title "The non-universality of critical conductance in quantum site-percolation" @default.
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- W1983402726 doi "https://doi.org/10.1016/s0042-207x(98)00045-1" @default.
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