Charged excitons trapped on monomolecular CdTe islands in wide ZnTe-(Zn,Mg)Te quantum wells

被引：11
|
作者：
Taliercio, T
Lefebvre, P
Calvo, V
Scalbert, D
Magnea, N
Mathieu, H
Allegre, J
机构：
[1] Univ Montpellier 2, CNRS, Etud Semicond Grp, F-34095 Montpellier 5, France
[2] CEA, Dept Rech Fondamentale Mat Condensee, F-38054 Grenoble, France
来源：
PHYSICAL REVIEW B | 1998年 / 58卷 / 23期
关键词：
D O I：
10.1103/PhysRevB.58.15408
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Optical spectroscopy at T = 2 K reveals systematically a low-energy companion to the features of heavy- and light-hole excitons localized on CdTe l-ML-high islands, buried in wide ZnTe/(Zn,Mg) Te quantum wells. These transitions are assigned to a negatively charged excitonic complex (trion) from magnetoreflectance and photoluminescence results. A mechanism of formation of the trion is proposed. A clear correlation is found between the exciton energies, which depend on the size and strain of the islands, and the trion binding energy, which varies between 1 and 3 meV. [S0163-1829(98)02248-6].
引用
收藏
页码：15408 / 15411
页数：4
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