Direct and exchange Coulomb energies in CdSe/ZnSe quantum dots

被引：4

作者：

Graham, TCM ^{[1
]}

Curran, A ^{[1
]}

Tang, X ^{[1
]}

Morrod, JK ^{[1
]}

Prior, KA ^{[1
]}

Warburton, RJ ^{[1
]}

机构：

[1] Heriot Watt Univ, Sch Engn & Phys Sci, Edinburgh EH14 4AS, Midlothian, Scotland

来源：

PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS | 2006年 / 243卷 / 04期

关键词：

D O I：

10.1002/pssb.200564654

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We have determined the direct and exchange electron-electron and electron-hole Coulomb energies in CdSe/ZnSe quantum dots. The experiments are based on single dot photoluminescence at low temperature. By controlling the charging with a vertical transistor structure and by applying a symmetry-breaking magnetic field, we show how we can determine all the Coulomb energies. The direct Coulomb energies are responsible for large, similar to 20 meV, red-shifts of the emission on charging. The exchange Coulomb energies lead to a very pronounced fine structure splitting, up to 2.6 meV, for the neutral exciton. (c) 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

引用

页码：782 / 786

页数：5

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