  In our tunneling investigation using Andreev superconductor - normal metal -
superconductor contacts on LiFeAs single crystals we observed two reproducible
independent subharmonic gap structures at dynamic conductance characteristics.
From these results, we can derive the energy of the large superconducting gap
$\Delta_L=(2.5 \div 3.4)$ meV and the small gap $\Delta_L=(0.9 \div 1)$ meV at
$T = 4.2$ K for the $T_C^{local} \approx (10.5 \div 14)$ K (the contact area
critical temperature which deviation causes the variation of $\Delta_L$). The
BCS-ratio is found to be $2\Delta_L/k_BT_C = (4.6 \div 5.6)$, whereas
$2\Delta_S/k_BT_C \ll 3.52$ results from induced superconductivity in the bands
with the small gap.
