Holographic Spectral Functions in Metallic AdS/CFT
arXiv:0904.3905 · doi:10.1088/1126-6708/2009/09/032
Abstract
We study the holographic D3/D7 setup dual to N=4 supersymmetric Yang-Mills with quenched fundamental matter. We extend the previous analyses of conductivity and photoproduction to the case where there is a finite electric field. Due to the electric field a special region in the D7-brane geometry, labelled the singular shell, appears generically, and the computation of correlators involves a careful study of the indicial exponents both at this singular region and at the horizon. We show that there is a unique choice consistent with the known expression for the electrical conductivity found by Karch and O'Bannon. We explore the parameter space spanned by the quark mass, the baryon density and the electric field. We find a region where the conductivity and photoproduction change rapidly and trace this behavior to competing effects which manifest themselves as a crossover behavior in the probe brane embeddings.
30 pages, 13 figures, v2. references added, minor corrections made
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- Scaling of the Holographic AC conductivity for non-Fermi liquids at criticality
- Relaxed hydrodynamic theory of electrically driven non-equilibrium steady states
- Holographic Schwinger Effect and Chiral condensate in SYM Theory
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- Holographic Confining Gauge theory and Response to Electric Field
- Current-induced inverse symmetry breaking and asymmetric critical phenomena at current-driven tricritical point
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