Volume 40, Number 6, December II 1997
|Page(s)||607 - 612|
|Published online||01 September 2002|
Correlations in two-dimensional electron gas: Random-phase approximation with exchange and ladder results
Center for Theory and Simulation in
Science and Engeneering and Laboratory of Atomic and Solid State Physics
Cornell University, Ithaca, New York 14853 (USA)
2 Departament d'Estructura i Constituents de la Matéria, Facultat de Fisica Universitat de Barcelona, E-08028 Barcelona, Spain
3 Sophia University, Department of Physics, 7-1 Kioi-cho, Chiyoda-ku, Tokyo 102, Japan
Accepted: 23 October 1997
We have evaluated the density-density response of the two-dimensional electron gas at zero temperature by solving the Dyson equation for the particle-hole Green's function, including exchange Coulomb matrix elements and short-range contributions in the ladder approximation. We study the effect of these correlations on the total energy, compressibility per particle, local field factor G(q), static structure factor and pair-correlation function. Results are compared with the normal random-phase approximation, local field theories and quantum Monte Carlo calculations.
PACS: 05.30.Fk – Fermion systems and electron gas / 71.45.Gm – Exchange, correlation, dielectric and magnetic functions, plasmons / 77.22.Ch – Permittivity (dielectric function)
© EDP Sciences, 1997
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.