Graphene plasmons: Impurities and nonlocal effects
Artikel i vetenskaplig tidskrift, 2018

This work analyzes how impurities and vacancies on the surface of a graphene sample affect its optical conductivity and plasmon excitations. The disorder is analyzed in the self-consistent Green’s function formulation and nonlocal effects are fully taken into account. It is shown that impurities modify the linear spectrum and give rise to an impurity band whose position and width depend on the two parameters of our model, the density and the strength of impurities. The presence of the impurity band strongly influences the electromagnetic response and the plasmon losses. Furthermore, we discuss how the impurity-band position can be obtained experimentally from the plasmon dispersion relation and discuss this in the context of sensing.

Författare

Giovanni Viola

Chalmers, Mikroteknologi och nanovetenskap (MC2), Tillämpad kvantfysik

Tobias Wenger

Chalmers, Mikroteknologi och nanovetenskap (MC2), Tillämpad kvantfysik

Jari Kinaret

Chalmers, Fysik, Kondenserade materiens teori

Mikael Fogelström

Chalmers, Mikroteknologi och nanovetenskap (MC2)

Physical Review B - Condensed Matter and Materials Physics

1098-0121 (ISSN)

Vol. 97 8 085429

Ämneskategorier

Oorganisk kemi

Annan fysik

Den kondenserade materiens fysik

Styrkeområden

Nanovetenskap och nanoteknik

Materialvetenskap

Fundament

Grundläggande vetenskaper

Infrastruktur

C3SE (Chalmers Centre for Computational Science and Engineering)

DOI

10.1103/PhysRevB.97.085429

Mer information

Senast uppdaterat

2018-03-28