Analytic theory of correlation energy and spin polarization in the 2D electron gas

被引：15

作者：

Asgari, R

Davoudi, B

Tosi, MP ^{[1
]}

机构：

[1] 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

来源：

SOLID STATE COMMUNICATIONS | 2004年 / 131卷 / 05期

关键词：

electron-electron interactions;

D O I：

10.1016/j.ssc.2004.05.029

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We present an analytic theory of the pair distribution function and the ground-state energy in a two-dimensional (2D) electron gas with an arbitrary degree of spin polarization. Our approach involves the solution of a zero-energy scattering Schrodinger equation with an effective potential which includes a Fermi term from exchange and kinetic energy and a Bose-like term from Jastrow-Feenberg correlations. The form of the latter is assessed from an analysis of data on a 2D gas of charged bosons. We obtain excellent agreement with data from quantum Monte Carlo studies of the 2D electron gas. In particular, our results for the correlation energy show a quantum phase transition occurring at coupling strength r(s) approximate to 24 from the paramagnetic to the fully spin-polarized fluid. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：301 / 305

页数：5

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