  One of the outstanding problems in Iron pnictide research is the unambiguous
detection of its pairing symmetry. The most probable candidates are the
two-band s$++$ and sign reversed s$\pm$ wave pairing. In this work, the Andreev
conductance and shot noise are used as a probe for the pairing symmetry of Iron
pnictide superconductors. Clear differences emerge in both the zero bias
differential conductance and the shot noise in the tunneling limit for the two
cases enabling an effective distinction between the two.

Superconductivity