title: Universal fermionic spectral functions from string theory.
abstract: We carry out the first holographic calculation of a fermionic response function for a strongly coupled d=3 system with an explicit D=10 or D=11 supergravity dual. By considering the supersymmetry current, we obtain a universal result applicable to all d=3 N=2 SCFTs with such duals. Surprisingly, the spectral function does not exhibit a Fermi surface, despite the fact that the system is at finite charge density. We show that it has a phonino pole and at low frequencies there is a depletion of spectral weight with a power-law scaling which is governed by a locally quantum critical point.
authors.affiliation: Theoretical Physics Group, Blackett Laboratory, Imperial College, London SW7 2AZ, United Kingdom.
authors.forename: Jerome P
authors.initials: JP
authors.lastname: Gauntlett
authors.forename: Julian
authors.initials: J
authors.lastname: Sonner
authors.forename: Daniel
authors.initials: D
authors.lastname: Waldram