Collective excitations of a system of coupled relativistic and non-relativistic two-dimensional electron gases

Abstract

We study collective excitations of a two-dimensional electron system consisting of two kinds of charge carriers: relativistic or Dirac electrons with linear dispersion and non-relativistic electrons with parabolic dispersion. We find that the strength of the interaction between the different charge carriers, i.e., the inter-species interaction, plays a significant role in determining the number of plasmon modes as well as their dispersions in certain parameter regimes.

8 pages, 7 figures, published version

References in corpus (3)

• Dielectric function, screening, and plasmons in 2D graphene
• Coexistence of the topological state and a two-dimensional electron gas on the surface of Bi2Se3
• Plasmons and Coulomb drag in Dirac/Schroedinger hybrid electron systems

Cited by in corpus (1)

• Electron pairing with gapless excitations in mixed double layers