Abstract
In this paper we study the localization properties of electrons in a two-dimensional model with both diagonal and spin-orientation dependent off-diagonal disorder resembling the simplified double-exchange couplings. The localization length and conductance of the system are calculated by using the finite-size scaling method combined with the transfer-matrix technique. We find that in the scaling transformation there is a set of fixed points in a continuous line in the region of $E<{E}_{c}$ for which the conductance is independent of sample size, indicating that the system undergoes a disorder driven Kosterlitz-Thouless-type metal-insulator transition.
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