# Plasmons in Holographic Graphene

### Submission summary

 As Contributors: Ulf Gran · Tobias Zingg Arxiv Link: https://arxiv.org/abs/1804.02284v4 Date submitted: 2019-07-09 Submitted by: Gran, Ulf Submitted to: SciPost Physics Domain(s): Theor. & Comp. Subject area: High-Energy Physics - Theory

### Abstract

We demonstrate how self-sourced collective modes - of which the plasmon is a prominent example due to its relevance in modern technological applications - are identified in strongly correlated systems described by holographic Maxwell theories. The characteristic $\omega \propto \sqrt{k}$ plasmon dispersion for 2D materials, such as graphene, naturally emerges from this formalism. We also demonstrate this by constructing the first holographic model containing this feature. This provides new insight into modeling such systems from a holographic point of view, bottom-up and top-down alike. Beyond that, this method provides a general framework to compute the dynamical charge response of strange metals, which has recently become experimentally accessible due to the novel technique of momentum-resolved electron energy-loss spectroscopy~(M-EELS). This framework therefore opens up the exciting possibility of testing holographic models for strange metals against actual experimental data.

###### Current status:
Editor-in-charge assigned

### Submission & Refereeing History

Submission 1804.02284v4 on 9 July 2019