Correlation Effects on 'Electron-Test Charge' Dielectric Functions of a Spin-polarized Electron Gas

被引:0
|
作者
Kim, Jae-Seok [1 ]
Park, Sungkyun [1 ]
Yi, Kyung-Soo [1 ]
机构
[1] Pusan Natl Univ, Dept Phys, Pusan 609735, South Korea
来源
PHYSICS OF SEMICONDUCTORS: 30TH INTERNATIONAL CONFERENCE ON THE PHYSICS OF SEMICONDUCTORS | 2011年 / 1399卷
关键词
spin-polarized electrons; local field corrections; electron-test charge dielectric functions; METALLIC DENSITIES;
D O I
10.1063/1.3666564
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
We present correlation effects on the spin-resolved 'electron-test charge' dielectric functions epsilon(up arrow up arrow)(q) and epsilon(down arrow down arrow)(q) of a spin-polarized electron gas (SPEG). The correlation effects are included in terms of spin-dependent local-field corrections (LFCs). Numerical results of spin-resolved static dielectric functions, which are formulated with a use of self-consistent local-field corrections, are compared with those of the random-phase approximation (RPA). We show that correlation corrections suppress the dielectric screening for parallel spin carriers in an SPEG. But, the behavior of spin-polarization dependence for epsilon(up arrow up arrow)(q) and epsilon(down arrow down arrow)(q) goes in opposite directions.
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页数:2
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