  In this note, we study the dipole coupling effect of holographic fermion in a
charged dilatonic black hole proposed by Gubser and Rocha (arXiv:0911.2898). It
is found that the property of Fermi liquid is rigid under perturbation of
dipole coupling, and the Fermi momentum is linearly shifted. A gap is
dynamically generated as the coupling becomes large enough and the Fermi
surface ceases to exist as the bulk dipole coupling further increases.
