Electron correlations in inversion layers
- 28 August 1976
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 9 (16) , 3055-3071
- https://doi.org/10.1088/0022-3719/9/16/012
Abstract
The two-dimensional electron gas (2DEG) is a widely used model for the electrons in the inversion layer of certain MOSFET devices. The sensitivity of a number of physical quantities of the 2DEG to a proper treatment of many-body effects has been examined. This was achieved by calculating the plasmon dispersion, pair correlation function, exchange and correlation energy and the self-energy at the Fermi level using three different approximations to the many-body problem, namely: (i) the RPA; (ii) the Hubbard approximation (HA); and (iii) the self-consistent STLS approximation of Singwi et al. (1968). The RPA and HA were found to be less satisfactory approximations for a 2DEG than for a 3DEG.Keywords
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