We report the results of high magnetic field study of granular 3D Al-Ge and demonstrate that intragranular superconductivity leads in truly insulating samples (with an exponentially diverging normal state resistivity), either to a global superconducting phase coherent state, or to a ``superconductor-insulator'' state with Cooper pairs totally localized within individual grains, depending on the strength of the intergranular Josephson coupling.
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Gerber et al. (1997) studied this question.
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