Concept of dielectric constant for nanosized systems

被引：149

作者：

Delerue, C

Lannoo, M

Allan, G

机构：

[1] Inst Elect & Microelect Nord, Dept ISEN, CNRS, UMR 8520, F-59046 Lille, France

[2] ISEM, Lab Mat & Microelect Provence, F-83000 Toulon, France

来源：

PHYSICAL REVIEW B | 2003年 / 68卷 / 11期

关键词：

D O I：

10.1103/PhysRevB.68.115411

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The screening properties of dielectric nanocrystals are analyzed. General arguments confirmed by detailed numerical calculations are presented. It is shown how macroscopic components of the electric field can still be defined for sizes larger than a few Fermi wavelengths and can still be obtained from the bulk dielectric function. The decrease of the average dielectric response with decreasing size is found to be due to the breaking of polarizable bonds at the surface and is not due to the opening of the band gap induced by the confinement.

引用

页数：4

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