Fluctuations and instabilities of a holographic metal
High Energy Physics - Theory
2013-02-13 v2 Strongly Correlated Electrons
Abstract
We analyze the quasinormal modes of the D2-D8' model of 2+1-dimensional, strongly-coupled, charged fermions in a background magnetic field and at nonzero density. The model is known to include a quantum Hall phase with integer filling fraction. As expected, we find a hydrodynamical diffusion mode at small momentum and the nonzero-temperature holographic zero sound, which becomes massive above a critical magnetic field. We confirm the previously-known thermodynamic instability. In addition, we discover an instability at low temperature, large mass, and in a charge density and magnetic field range near the quantum Hall phase to an inhomogeneous striped phase.
Keywords
Cite
@article{arxiv.1211.1381,
title = {Fluctuations and instabilities of a holographic metal},
author = {Niko Jokela and Matti Jarvinen and Matthew Lippert},
journal= {arXiv preprint arXiv:1211.1381},
year = {2013}
}
Comments
25 pages, 13 figures; v2. minor improvements to match published version