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We investigate the scaling properties of the two-dimensional (2D) Andersonmodel of localization with purely off-diagonal disorder (random hopping). Usingthe transfer-matrix method and finite-size scaling we compute the infinite-sizelocalization lengths for bipartite square and hexagonal 2D lattices,non-bipartite triangular lattices and different distribution functions for thehopping elements. We show that for small energies the localization lengths inthe bipartite case diverge with a power-law behavior. The correspondingexponents are in the range $0.2 - 0.6$ and seem to depend on the type and thestrength of disorder.Comment: proceedings of the International Conference on "Quantum Transport and  Quantum Coherence" - Localisation 200

Divergences of the Localization Lengths in the Two-Dimensional, Off-Diagonal Anderson Model on Bipartite Lattices