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Résumé |
Holographic models provide unique laboratories to investigate nonlinear physics of transport in
inhomogeneous systems. We provide a detailed account of both DC and AC conductivities in a defect
conformal field theory with spontaneous stripe order. The spatial symmetry is broken at large chemical
potential and the resulting ground state is a combination of a spin and charge density wave. An infinitesimal
applied electric field across the stripes will cause the stripes to slide over the underlying density of smeared
impurities, a phenomenon which can be associated with the Goldstone mode for the spontaneously broken
translation symmetry. |
