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Kubo formula is used to get the scaling behavior of the static conductancedistribution of wide wires showing pure non-diagonal disorder. Following recentworks that point to unusual phenomena in some circumstances, scaling at theband center of wires of odd widths has been numerically investigated. While theconductance mean shows a decrease that is only proportional to the inversesquare root of the wire length, the median of the distribution exponentiallydecreases as a function of the square root of the length. Actually, the wholedistribution decays as the inverse square root of the length except close toG=0 where the distribution accumulates the weight lost at larger conductances.It accurately follows the theoretical prediction once the free parameter iscorrectly fitted. Moreover, when the number of channels equals the wire lengthbut contacts are kept finite, the conductance distribution is still describedby the previous model. It is shown that the common origin of this behavior is asimple Gaussian statistics followed by the logarithm of the E=0 wavefunctionweight ratio of a system showing chiral symmetry. A finite value of thetwo-dimensional conductance mean is obtained in the infinite size limit. Bothconductance and the wavefunction statistics distributions are given in thislimit. This results are consistent with the 'critical' character of the E=0wavefunction predicted in the literature.Comment: 10 pages, 9 figures, RevTeX macr

Conductance scaling at the band center of wide wires with pure nondiagonal disorder