Graphene plasmons: Impurities and nonlocal effects
Journal article, 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.

Author

Giovanni Viola

Chalmers, Microtechnology and Nanoscience (MC2), Applied Quantum Physics

Tobias Wenger

Chalmers, Microtechnology and Nanoscience (MC2), Applied Quantum Physics

Jari Kinaret

Chalmers, Physics, Condensed Matter Theory

Mikael Fogelström

Chalmers, Microtechnology and Nanoscience (MC2)

Physical Review B - Condensed Matter and Materials Physics

1098-0121 (ISSN)

Vol. 97 8 085429

Subject Categories

Inorganic Chemistry

Other Physics Topics

Condensed Matter Physics

Areas of Advance

Nanoscience and Nanotechnology (2010-2017)

Materials Science

Roots

Basic sciences

Infrastructure

C3SE (Chalmers Centre for Computational Science and Engineering)

DOI

10.1103/PhysRevB.97.085429

More information

Latest update

3/28/2018