A site-dilute model with nearest-neighbor interactions is examined by reduction to tridiagonal form. The statistical behavior of the tridiagonal coefficients is argued to imply localization for xc≈0.05 and 0.62 in square and cubic lattices, respectively, with considerable ambiguity in the former value. The limitations of the method are discussed, and the present study extends and corrects an earlier one.
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Raghu Raghavan (1984) studied this question.
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