Analytical expressions for the charge-charge local-field factor and the exchange-correlation kernel of a two-dimensional electron gas

被引：50
|
作者：
Davoudi, B
Polini, M
Giuliani, GR
Tosi, MP
机构：
[1] Scuola Normale Super Pisa, INFM, NEST, I-56126 Pisa, Italy
[2] Scuola Normale Super Pisa, Classe Sci, I-56126 Pisa, Italy
[3] Inst Studies Theoret Phys & Math, Tehran 193955531, Iran
[4] Purdue Univ, Dept Phys, W Lafayette, IN 47907 USA
来源：
PHYSICAL REVIEW B | 2001年 / 64卷 / 15期
关键词：
D O I：
10.1103/PhysRevB.64.153101
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We present an analytical expression for the static many-body local field factor G(divided by)(q) of a homogeneous two-dimensional electron gas, which reproduces diffusion Monte Carlo data and embodies the exact asymptotic behaviors at both small and large wave number q. This allows us to also provide a closed-form expression for the exchange and correlation kernel K-xc(r), which represents a key input for density functional studies of inhomogenous systems.
引用
收藏
页码：1531011 / 1531013
页数：3
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