Interface optical phonons and their electron-phonon interactions in ZnS/CdS multi-shell spherical quantum dots

被引：3
|
作者：
Huang, Wen Deng [1 ]
Bao, Li Fu [1 ]
Ren, Ya Jie [1 ]
Yuan, Zhao Lin [1 ]
机构：
[1] Shaanxi Univ Technol, Sch Phys & Telecommun Engn, Dept Phys, Hanzhong 723001, Peoples R China
来源：
SUPERLATTICES AND MICROSTRUCTURES | 2018年 / 116卷
基金：
中国国家自然科学基金;
关键词：
Phonon mode; Electron-phonon interaction; Quantum dot; BILAYER SYSTEMS; SURFACE; SUPERLATTICES; EMISSION; WELLS;
D O I：
10.1016/j.spmi.2018.02.015
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The properties of interface optical phonons and their electron-phonon interactions in ZnS/CdS multi-shell spherical quantum dots are studied by adopting dielectric continuum model. The dispersion curves and electron-phonon coupling strengths for interface optical phonons in ZnS/CdS multi-shell dots are calculated and analyzed in detail. It is shown that the number of interface optical phonon branches increase with the increase of layers of multi-shell quantum dots. The number of interface optical phonons increase two branches for increasing one layer material. The dispersions of interface optical phonon with low quantum number I are weak. The electron-interface optical phonon interactions are mainly localized at hetero-interfaces. The interface optical phonons with low quantum number I have important contribution to electron-interface optical phonon interactions. (C) 2018 Elsevier Ltd. All rights reserved.
引用
收藏
页码：36 / 43
页数：8
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