We holographically investigate the effects of a dipole coupling between a fermion field and a U(1) gauge field on the dual fermionic sector in the charged gravity bulk with hyperscaling violation. We analytically study the features of the ultraviolet and infrared Green's functions of the dual fermionic system and we show that as the dipole coupling and the hyperscaling violation exponent are varied, the fluid possess Fermi, marginal Fermi, non-Fermi liquid phases and also an additional Mott insulating phase. We find that the increase of the hyperscaling violation exponent which effectively reduces the dimensionality of the system makes it harder for the Mott gap to be formed. We also show that the observed duality between zeros and poles in the presence of a dipole moment coupling still persists in theories with hyperscaling violation.
ARISTEIA II action of the operational programme education and long life learning - European Union (European Social Fund)
; National Resources
; Chilean FONDECYT 
; Natural Science Foundation of China
; Program for Liaoning Excellent Talents in University [LJQ2014123]