修正库仑势为1/r^p情况下的二维电子气基态能(英文)  

The ground-state energy of the electron gas with the modified Coulomb potential 1/r^p in two dimensions

作　　者：傅梁杰[1] 陈渊[1] 

机构地区：[1]广州大学物理与电子工程学院,广东广州510006

出　　处：《广州大学学报（自然科学版）》2009年第5期18-22,共5页Journal of Guangzhou University:Natural Science Edition

基　　金：Supported by the National Natural Science Foundation of China (10475021)

摘　　要：根据空穴的正电荷屏蔽效应,库仑势1/r修正为1/rp.利用量子多体微扰理论的方法,取得二维电子气基态能的简单解析表达式,得到了基态能E和平衡半径resq与作用参数p的依赖关系.在低密度情况下,得到的结果与数值模拟、半解析方法给出的结果一致.In this paper,due to the effect of positively-charged screening holes,the Coulomb potential energy 1/r is modified to be 1/rp.Using many-body quantum perturbation theory,we obtain a simple analytic representation of the ground state energy for a two-dimensional electron gas.It is found that the ground-state energy E and equilibrium radius reps are dependent on the interaction parameter p.Our results agree with those obtained by the numerical simulations and semi-analytic methods at low density limit.

关 键 词：基态能 电子气 修正库仑势 

分 类 号：O471[理学—半导体物理]