LOCAL-FIELD CORRECTION OF THE CHARGED BOSE CONDENSATE FOR 2 AND 3 DIMENSIONS

被引：41

作者：

GOLD, A

机构：

[1] Laboratoire de Physique des Solides, Université Paul Sabatier, Toulouse, F-31062

来源：

ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER | 1992年 / 89卷 / 01期

关键词：

D O I：

10.1007/BF01320822

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The local-field correction for the dielectric function of the two-dimensional and of the three-dimensional Bose condensate is calculated within a sum-rule version of the Singwi et al. (Phys. Rev. 176, 589 (1968)) approach. We derive analytical expressions for small and large wave numbers and give analytical expressions for the density dependence. We compare the results of the groundstate energy for the three-dimensional system with Monte-Carlo computations. In two dimensions a roton structure in the plasmon dispersion is found at low boson density. The plasmon density of states is calculated. A correlation induced charge-density-wave instability in layered structures of two-dimensional Bose gases is discussed.

引用

页码：1 / 10

页数：10

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