Multiband superconductivity is an outstanding issue of recent research. The discovery of two-band superconductivity in MgB₂ has revitalized the interest in multigap superconductivity. A first experimental hint at the opening of multiple gaps at the Fermi energy is a low temperature anomaly in the specific heat measurement in the superconducting state. Recently, Nb₃Sn have shown similar behavior, namely nonexponential decay and a plateau at low temperature. Point contact spectroscopy is done in order to directly probe the structure of the superconducting energy gap these materials spectroscopically.

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