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|Abstract:||We investigate and classify Fermi surface behavior for a set of fermionic modes in a family of backgrounds holographically dual to N = 4 super-Yang-Mills theory at zero temperature with two distinct chemical potentials. We numerically solve fluctuation equations for every spin-1/2 field in five-dimensional maximally supersymmetric gauged supergravity not mixing with gravitini. Different modes manifest two, one, or zero Fermi surface singularities, all associated with non-Fermi liquids, and we calculate dispersion relations and widths of excitations. We study two limits where the zero-temperature entropy vanishes. In one limit, a Fermi surface approaches a marginal Fermi liquid, which we demonstrate analytically, and conductivity calculations show a hard gap with the current dual to the active gauge field superconducting, while the other is insulating. In the other limit, conductivities reveal a soft gap with the roles of the gauge fields reversed.|
|Electronic Publication Date:||6-Nov-2012|
|Citation:||DeWolfe, Oliver, Gubser, Steven S, Rosen, Christopher. (2012). Fermi surfaces in N=4 super-Yang-Mills theory. PHYSICAL REVIEW D, 86 (10.1103/PhysRevD.86.106002|
|Type of Material:||Journal Article|
|Journal/Proceeding Title:||PHYSICAL REVIEW D|
|Version:||Final published version. This is an open access article.|
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