Plasmons in holographic graphene
Ulf Gran, Marcus Tornsö, Tobias Zingg
SciPost Phys. 8, 093 (2020) · published 25 June 2020
- doi: 10.21468/SciPostPhys.8.6.093
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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.
Cited by 5
Authors / Affiliations: mappings to Contributors and Organizations
See all Organizations.- 1 Ulf Gran,
- 1 Marcus Tornsö,
- 2 3 4 Tobias Zingg
- 1 Chalmers Tekniska Högskola / Chalmers University of Technology
- 2 Kungliga Tekniska högskolan / Royal Institute of Technology (KTH) [KTH]
- 3 Stockholm University [Univ Stockholm]
- 4 Helsingfors universitet / University of Helsinki [UH]