Friedel oscillations in holographic metals
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- Puletti, V.G.M., Nowling, S., Thorlacius, L. et al. J. High Energ. Phys. (2012) 2012: 73. doi:10.1007/JHEP01(2012)073
In this article we study the conditions under which holographic metallic states display Friedel oscillations. We focus on systems where the bulk charge density is not hidden behind a black hole horizon. Understanding holographic Friedel oscillations gives a clean way to characterize the boundary system, complementary to probe fermion calculations. We find that fermions in a “hard wall” AdS geometry unambiguously display Friedel oscillations. However, similar oscillations are washed out for electron stars, suggesting a smeared continuum of Fermi surfaces.