Plasma modes of a two-dimensional electron gas with a two-dimensional modulation of the charge density
- 15 November 1987
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 36 (14) , 7631-7634
- https://doi.org/10.1103/physrevb.36.7631
Abstract
We study the plasma modes of a two-dimensional electron gas in which the equilibrium electron density is a periodic function of both coordinates in the plane of the electron gas. The special case of a square symmetric modulation of the equilibrium density is calculated numerically. The plasmon dispersion displays a band structure similar to that found for single-particle energy bands. The results are compared with those obtained from perturbation theory valid for a weak electron-density modulation.Keywords
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