位置相关的有效质量和不对称性对改进罗森-莫尔斯势量子阱的电子和光学性质的影响

IF 1.9 Q3 PHYSICS, CONDENSED MATTER
Esin Kasapoglu, Melike Behiye Yücel, Carlos A. Duque
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引用次数: 0

摘要

在这项研究中,我们首次研究了空间变化的有效质量、不对称参数和阱宽度对具有改进的罗森-莫尔斯势的量子阱的电子和光学性质的影响。在有效质量和抛物线带近似的框架内进行了计算。我们采用对角化的方法,选择一个基于三角标准正交函数的波函数来求出限制在改进的罗森-莫尔斯势内的电子的本征值和本征函数。我们的研究结果表明,位置依赖、质量、不对称性和约束参数会导致我们所关注的结构的电子和光学性质发生显著变化,因为这些影响会导致电子能量的显著增加和吸收光谱的蓝移。能级的增加使光电器件的发展能够在更宽的波长下工作并吸收更高能量的光子。通过适当选择参数,罗森-莫尔斯势提供了许多优点,其中包括模拟接近暴露于空气或真空表面的异质结构的可能性,从而提供了在系统对称性破坏的情况下大量丰富允许的光学跃迁的可能性。同样,本文提出的一维罗森-莫尔斯势模型也可以推广到核/壳量子阱线和量子点等一维和零维结构。这为光通信、成像技术和太阳能电池等领域提供了潜在的进步。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Position-Dependent Effective Mass and Asymmetry Effects on the Electronic and Optical Properties of Quantum Wells with Improved Rosen–Morse Potential
In this study, we investigated, for the first time, the effects of the spatially varying effective mass, asymmetry parameter, and well width on the electronic and optical properties of a quantum well which has an improved Rosen–Morse potential. Calculations were made within the framework of the effective mass and parabolic band approximations. We have used the diagonalization method by choosing a wave function based on the trigonometric orthonormal functions to find eigenvalues and eigenfunctions of the electron confined within the improved Rosen–Morse potential. Our results show that the position dependence mass, asymmetry, and confinement parameters cause significant changes in the electronic and optical properties of the structure we focus on since these effects create a significant increase in electron energies and a blue shift in the absorption spectrum. The increase in energy levels enables the development of optoelectronic devices that can operate at wider wavelengths and absorb higher-energy photons. Through an appropriate choice of parameters, the Rosen–Morse potential offers, among many advantages, the possibility of simulating heterostructures close to surfaces exposed to air or vacuum, thus giving the possibility of substantially enriching the allowed optical transitions given the breaking of the system´s symmetries. Similarly, the one-dimensional Rosen–Morse potential model proposed here can be extended to one- and zero-dimensional structures such as core/shell quantum well wires and quantum dots. This offers potential advancements in fields such as optical communication, imaging technology, and solar cells.
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来源期刊
Condensed Matter
Condensed Matter PHYSICS, CONDENSED MATTER-
CiteScore
2.90
自引率
11.80%
发文量
58
审稿时长
10 weeks
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