Correlations in two-dimensional electron gas: Random-phase approximation with exchange and ladder results

被引：8
|
作者：
Pederiva, F [1 ]
Lipparini, E
Takayanagi, K
机构：
[1] Cornell Univ, Ctr Theory & Simulat Sci & Engn, Ithaca, NY 14853 USA
[2] Cornell Univ, Atom & Solid State Phys Lab, Ithaca, NY 14853 USA
[3] Univ Barcelona, Fac Fis, Dept Estructura & Constituents Mat, E-08028 Barcelona, Spain
[4] Sophia Univ, Dept Phys, Chiyoda Ku, Tokyo 102, Japan
来源：
EUROPHYSICS LETTERS | 1997年 / 40卷 / 06期
关键词：
D O I：
10.1209/epl/i1997-00511-0
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
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.
引用
收藏
页码：607 / 612
页数：6
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