Collective excitations of a system of coupled relativistic and non-relativistic two-dimensional electron gases
arXiv:1405.4014 · doi:10.1103/PhysRevB.90.045103
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.
arXiv comment8 pages, 7 figures, published version
References in corpus (13)
- Dielectric function, screening, and plasmons in 2D graphene
- Model Hamiltonian for Topological Insulators
- Coexistence of the topological state and a two-dimensional electron gas on the surface of Bi2Se3
- Plasmons in graphene: Recent progress and applications
- Observation of Dirac plasmons in a topological insulator
- Observation of Dirac node formation and mass acquisition in a topological crystalline insulator
- Collective modes of a helical liquid
- Double-layer graphene and topological insulator thin-film plasmons
- Intrinsic plasmons in 2D Dirac materials
- Plasmons and Coulomb drag in Dirac/Schroedinger hybrid electron systems
- Spin-charge separation of plasmonic excitations in thin topological insulators
- Collective excitations on a surface of topological insulator
- Spin-plasmons in topological insulator