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Spatial modulation and conductivities in effective holographic theories

Rangamani, Mukund; Rozali, Moshe; Smyth, Darren

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Authors

Mukund Rangamani

Moshe Rozali

Darren Smyth



Abstract

We analyze a class of bottom-up holographic models for low energy thermo-electric transport. The models we focus on belong to a family of Einstein-Maxwell-dilaton theories parameterized by two scalar functions, characterizing the dilaton self-interaction and the gauge coupling function. We impose spatially inhomogeneous lattice boundary conditions for the dilaton on the AdS boundary and study the resulting phase structure attained at low energies. We find that as we dial the scalar functions at our disposal (changing thus the theory under consideration), we obtain either (i) coherent metallic, or (ii) insulating, or (iii) incoherent metallic phases. We chart out the domain where the incoherent metals appear in a restricted parameter space of theories. We also analyze the optical conductivity, noting that non-trivial scaling behaviour at intermediate frequencies appears to only be possible for very narrow regions of parameter space.

Citation

Rangamani, M., Rozali, M., & Smyth, D. (2015). Spatial modulation and conductivities in effective holographic theories. Journal of High Energy Physics, 2015(7), Article 24. https://doi.org/10.1007/jhep07%282015%29024

Journal Article Type Article
Acceptance Date Jun 12, 2015
Online Publication Date Jul 30, 2015
Publication Date Jul 31, 2015
Deposit Date Apr 23, 2019
Publicly Available Date Apr 23, 2019
Journal Journal of High Energy Physics
Print ISSN 1126-6708
Publisher Scuola Internazionale Superiore di Studi Avanzati (SISSA)
Peer Reviewed Peer Reviewed
Volume 2015
Issue 7
Article Number 24
DOI https://doi.org/10.1007/jhep07%282015%29024

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Publisher Licence URL
http://creativecommons.org/licenses/by/4.0/

Copyright Statement
This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.




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