Starting from a t-J model, we introduce inhomogeneous terms to mimic stripe
s. We find that if the inhomogeneous terms break the SU(2) spin symmetry th
e binding between holes is tremendously enhanced in the thermodynamic limit
. In any other model (including homogeneous models) the binding in the ther
modynamic limit is small or neglible. By including these inhomogeneous term
s we can reproduce experimental neutron scattering data. We also discuss th
e connection of the resulting inhomogeneity-induced superconductivity to re
cent experimental evidence for a linear relation between magnetic incommens
urability and the superconducting transition temperature, as a function of
doping.