Suppression of the Kondo effect in T-shaped double dots system

We calculate the tunneling conductance through a system of double dots in parallel geometry, in which only the first dot is connected to the leads whereas the second dot to the first one. Transport properties are considerably affected by tunable parameters of the second dot. In particular, we find the suppression of the conductance in the Kondo regime, which is due to the interplay of the Kondo effect and the interference effect.