Holographic pinning
High Energy Physics - Theory
2017-12-06 v2 Strongly Correlated Electrons
Abstract
In a holographic probe-brane model exhibiting a spontaneously spatially modulated ground state, we introduce explicit sources of symmetry breaking in the form of ionic and antiferromagnetic lattices. For the first time in a holographic model, we demonstrate pinning, in which the translational Goldstone mode is lifted by the introduction of explicit sources of translational symmetry breaking. The numerically computed optical conductivity fits very well to a Drude-Lorentz model with a small residual metallicity, precisely matching analytic formulas for the DC conductivity. We also find an instability of the striped phase in the presence of a large-amplitude ionic lattice.
Cite
@article{arxiv.1708.07837,
title = {Holographic pinning},
author = {Niko Jokela and Matti Jarvinen and Matthew Lippert},
journal= {arXiv preprint arXiv:1708.07837},
year = {2017}
}
Comments
26 pages, 13 figures. v2: minor corrections, references updated