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

Ajit C. Balram; Jimmy A. Hutasoit; Jainendra K. Jain

doi:10.1103/PhysRevB.90.045103

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

Ajit C. Balram, Jimmy A. Hutasoit, Jainendra K. Jain

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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 nonrelativistic electrons with parabolic dispersion. We find that the strength of the interaction between the different charge carriers, i.e., the interspecies interaction, plays a significant role in determining the number of plasmon modes as well as their dispersions in certain parameter regimes.

Original language	English (US)
Article number	045103
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	90
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevB.90.045103
State	Published - Jul 3 2014

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.90.045103

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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 nonrelativistic electrons with parabolic dispersion. We find that the strength of the interaction between the different charge carriers, i.e., the interspecies interaction, plays a significant role in determining the number of plasmon modes as well as their dispersions in certain parameter regimes.",

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AB - 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 nonrelativistic electrons with parabolic dispersion. We find that the strength of the interaction between the different charge carriers, i.e., the interspecies interaction, plays a significant role in determining the number of plasmon modes as well as their dispersions in certain parameter regimes.

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

Abstract

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