  We construct a holographic model in the framework of Q-lattices whose dual
exhibits metal-insulator transitions. By introducing an interacting term
between the Q-lattice and the electromagnetic field in bulk geometry, we find
such kind of transition can be Mott-like. The evidences are presented as
follows. i) The transition from a metallic phase to an insulating phase occurs
when the lattice constant becomes larger. ii) A hard gap in the insulating
phase can be manifestly observed in the optical conductivity. Nevertheless, in
the zero temperature limit this model exhibits novel metallic behavior,
featured by a gap as well as a zero-frequency mode with tiny spectral weight.
It implies that our model is dual to a doped Mott system in one dimension where
umklapp scattering is frozen at zero temperature. The similarity between this
model and some organic linear chain conductors is briefly discussed.
