Plasmons in holographic graphene
Artikel i vetenskaplig tidskrift, 2020

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 ω ∝ pk 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.

Författare

Ulf Gran

Chalmers, Fysik, Subatomär, högenergi- och plasmafysik

Marcus Tornsö

Chalmers, Fysik, Subatomär, högenergi- och plasmafysik

T. Zingg

Stockholms universitet

Helsingin Yliopisto

SciPost Physics

25424653 (eISSN)

Vol. 8 6 093

Ämneskategorier

Atom- och molekylfysik och optik

Annan fysik

Den kondenserade materiens fysik

DOI

10.21468/SciPostPhys.8.6.093

Mer information

Senast uppdaterat

2020-08-19