Effect of uniaxial strain on plasmon excitations in graphene

TL;DR

This paper investigates how uniaxial strain affects plasmon excitations in graphene, revealing that strain shifts and broadens plasmaron energy dispersion, offering a new way to tune graphene's plasmaronic properties.

Contribution

It provides a theoretical prediction that uniaxial strain modifies plasmaron dispersion in graphene, expanding the understanding of strain effects on electronic excitations.

Findings

Plasmaron energy dispersion is shifted by uniaxial strain.

Uniaxial strain broadens plasmaron spectral features.

Strain can be used to tune plasmaronic properties in graphene.

Abstract

Uniaxial strain is known to modify significantly the electronic properties of graphene, a carbon single layer of atomic width. Here, we study the effect of applied strain on the composite excitations arising from the coupling of charge carriers and plasmons in graphene, i.e. the plasmarons. Specifically, we predict that the plasmaron energy dispersion, which has been recently observed experimentally in unstrained graphene, is shifted and broadened by applied uniaxial strain. Thus, strain constitutes an additional parameter which may be useful to tune graphene properties in plasmaronic devices.