COLLECTIVE INTERACTIONS IN A QUANTUM-WELL - THE INCLUSION OF NONLOCAL EXCHANGE

被引:32
|
作者
RYAN, JC
机构
[1] Naval Research Laboratory, Washington
来源
PHYSICAL REVIEW B | 1991年 / 43卷 / 15期
关键词
D O I
10.1103/PhysRevB.43.12406
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We present a variational scheme for calculating the irreducible polarizability of an electron system and apply this method to the exchange interaction in a single quantum well. The collective spin-density and intersubband plasmon energies are derived and evaluated numerically in an infinite-square-well approximation. These results are compared with experiments as well as with the previous theoretical results based upon the local-density approximation.
引用
收藏
页码:12406 / 12412
页数:7
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