Fermi surfaces in maximal gauged supergravity

Details Fermi surfaces in maximal gauged supergravity Fermi surfaces in maximal gauged supergravity

2011-12-13

arxiv.org/abs/1112.3036v1

Physics

High Energy Physics

High Energy Physics - Theory

6 pages

Scientific paper

We obtain fermion fluctuation equations around extremal charged black hole geometries in maximal gauged supergravity in four and five dimensions, and we demonstrate that their solutions display Fermi surface singularities for the dual conformal field theories at finite chemical potential. The four-dimensional case is a massless charged fermion, while in five dimensions we find a massive charged fermion with a Pauli coupling. In both cases, the corresponding scaling exponent is less than one half, indicating non-Fermi liquid behavior, but some quasiparticle excitations have widths more than ten times smaller than their excitation energy. In the five-dimensional case, both the Fermi momentum and the scaling exponent appear to have simple values, and a Luttinger calculation suggests that the gauginos may carry most of the charge of the black hole.

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