研究目的
Investigating the temperature-dependent band-like electronic mobilities in 2D quantum dot arrays considering a realistic quantum dot size distribution.
研究成果
The presented transport model effectively accounts for the effects of temperature, Fermi level position, and a realistic size distribution in quantum dot arrays. It provides a good agreement with experimental results, highlighting the importance of size dispersion in determining carrier mobility.
研究不足
The model assumes impurity QDs with radii smaller than the periodic QDs to avoid introducing strain. The study is limited to low concentrations of impurity QDs to ensure the applicability of perturbation theory and Fermi’s golden rule.
1：Experimental Design and Method Selection:
The theoretical method was divided into several stages, including the semi-empirical pseudopotential method for calculating isolated QD potentials, the tight-binding approach for solving the Schr?dinger equation in the 2D array, and Fermi’s golden rule for computing carrier scattering rates.
2：Sample Selection and Data Sources:
The study focused on 2D square and hexagonal superlattices of InSb and CdSe quantum dots with specific radii.
3：List of Experimental Equipment and Materials:
Not explicitly mentioned in the paper.
4：Experimental Procedures and Operational Workflow:
The methodology involved computing miniband structures, introducing impurity QDs as perturbations, and calculating mobility tensors for electrons in the lowest energy miniband.
5：Data Analysis Methods:
The mobility dependence on temperature was analyzed using the transport model, comparing theoretical results with experimental data.
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