Anisotropic destruction of the Fermi surface in inhomogeneous holographic lattices

Anisotropic destruction of the Fermi surface in inhomogeneous holographic lattices

Blog Article

Abstract We analyze fermionic response of strongly correlated holographic matter in presence of inhomogeneous periodically modulated potential mimicking the crystal lattice.The modulation is sourced by a scalar operator that explicitly breaks the translational symmetry in one direction.We compute the fermion spectral function and show that it either exhibits a well defined Fermi surface with umklapp gaps opening on the Brillouin zone boundary at small lattice wave vector, or, when the fleshlight automatique wave vector is large, the Fermi surface is anisotropically deformed and the quasiparticles get significantly broadened in the direction of translation symmetry breaking.Making use of here the ability of our model to smoothly extrapolate to the homogeneous Q-lattice like setup, we show that this novel effect is not due to the periodic modulation of the potential and Umklapp physics, but rather due to the anisotropic features of the holographic horizon.That means it encodes novel physics of strongly correlated critical systems which may be relevant for phenomenology of exotic states of electron matter.