Potential Energy Fluctuation in Quasi Two-Dimensional Electron Gas Due to External Ionized Impurities |
| P. Kębliński Institute of Physics, Poljsh Academy of Science ,al. Lotników 32/46, 02-668 Warszawa, Poland |
| Full Text PDF |
| Two-dimensional electron gas separated from Coulomb centers by a spacer is considered. Electrons are treated semi classically in limit of weak fluctuation and T = 0. Two screening models, Thomas-Fermi and RPA, are in dependently used. The second moment of the potential energy distribution is calculated analytically as a function of the spacer width. The qualitative arguments for the Gaussian character of the distribution are given and the density of states for such a distribution is calculated. |
| DOI: 10.12693/APhysPolA.80.321 PACS numbers: 73.20.Hb |