Correlation energy of a two-dimensional electron gas

Scientific paper - Original scientific paper

• Author: Z. Lenac; MBZ: 25722
• Author: Marijan Šunjić
• Author's institution: University of Zagreb; Faculty of Science; (Department of Physics)
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics

Abstract (english)

Extending the Hedin-Lundqvist approximation, originally developed for the three-dimensional electron gas, we derive the correlation energy Ec for the two-dimensional electron gas as a function of electron density ρ. A simple two-parameter function Ec(ρ) reproduces very well the first-principles numerical results in the whole density range. We also present a simple and accurate form of the correlation part of the chemical potential, which can be used, e.g., as a correlation part of the effective potential in the local-density approximation for two-dimensional electron systems.

• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Journal title: Physical Review B (Condensed Matter)
• Numbering: vol. 50, no. 15, pp. 10792-10795
• p-ISSN: 0163-1829
• DOI: https://doi.org/10.1103/PhysRevB.50.10792
• URN:NBN: urn:nbn:hr:217:880411
• Publication: 1994
• Document URL: http://link.aps.org/doi/10.1103/PhysRevB.50.10792
• Type of resource: Text
• Access conditions: Open access
• Public note: Copyright (1994) by the American Physical Society.
• Created on: 2019-10-03 07:49:10