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We show experimentally that in nanometer scaled superconductor/normal metalhybrid devices and in a small window of contact resistances, crossed Andreevreflection (CAR) can dominate the nonlocal transport for all energies below thesuperconducting gap. Besides CAR, elastic cotunneling (EC) and nonlocal chargeimbalance (CI) can be identified as competing subgap transport mechanisms intemperature dependent four-terminal nonlocal measurements. We demonstrate asystematic change of the nonlocal resistance vs. bias characteristics withincreasing contact resistances, which can be varied in the fabrication process.For samples with higher contact resistances, CAR is weakened relative to EC inthe midgap regime, possibly due to dynamical Coulomb blockade. Gaining controlof CAR is an important step towards the realization of a solid state entangler.

Contact resistance dependence of crossed Andreev reflection