首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >Tight-binding theory in morphological evolution of CdSe/ZnS core/shell nanodisk to CdSe/ZnS core/shell nanorods
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Tight-binding theory in morphological evolution of CdSe/ZnS core/shell nanodisk to CdSe/ZnS core/shell nanorods

机译:CdSe / ZnS核/壳纳米棒向CdSe / ZnS核/壳纳米棒形态演化的紧密结合理论

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摘要

The atomistic tight-binding study is implemented to model the structural and optical properties in the morphological evolution of a CdSe/ZnS core/shell nanodisk to CdSe/ZnS core/shell nanorods by changing the length-to-diameter ratios. I show that the hole ground state undergoes a transition from a heavy-hole-like to a light-hole-like state by increasing the aspect ratios. The common monotonic behaviours of single-particle spectra, atomistic character, e-h overlap, radiative lifetime, excitonic spectra, and oscillation strength are mainly elucidated and quantified to address the relative impact on the structural transformation from disk to rod. The numerical computation and physical analysis are conducted to provide a useful guideline for the unique structural and optical properties by using a light hole instead of a heavy hole.
机译:通过改变长径比,进行了原子紧密结合研究,以建模从CdSe / ZnS核/壳纳米盘到CdSe / ZnS核/壳纳米棒的形态演变中的结构和光学性质。我表明,通过增加长宽比,孔的基态经历了从重孔状到轻孔状的转变。主要阐明并量化了单粒子光谱,原子特性,e-h重叠,辐射寿命,激子光谱和振荡强度的常见单调行为,以解决对从圆盘到棒的结构转变的相对影响。进行了数值计算和物理分析,以通过使用轻孔而不是重孔为独特的结构和光学特性提供有用的指导。

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