A. Asatryan, A. Movsisyan, L. Vardanyan, S. Hayrapetyan, A. Kirakosyan
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引用次数: 0
摘要
采用改进的Lee， Low， and Pines中间耦合变分方法研究了纤锌矿圆柱形ZnO纳米线中准一维Fröhlich极化子的基本特性。研究了外加电场和磁场对光声子谱的影响，并考虑了光声子谱的空间约束。结果与锌-闪锌矿CdSe、GaAs和纤锌矿GaN圆柱纳米线的结果进行了比较。对不同光学声子模式的贡献进行了评估，表明界面声子在细线中的主导作用。研究发现，与电场相比，磁场对极化子自能和有效质量的影响可以忽略。研究结果将为进一步探索纤锌矿纳米结构的声子辅助电光性质提供理论依据。
Quasi-One-Dimensional Fröhlich Polaron Characteristics in ZnO Nanowires under the External Fields
A modified Lee, Low, and Pines intermediate coupling variational method is used to study the basic characteristics of the quasi-one-dimensional Fröhlich polaron in wurtzite cylindrical ZnO nanowires. The influence of external electric and magnetic fields is investigated and the spatial confinement of the optical phonon spectrum is considered. The results are compared with those obtained for the zinc-blende CdSe, GaAs, and wurtzite GaN cylindrical nanowires. An assessment of the contributions of different optical phonon modes indicates the predominant role of interface phonons in thin wires. It has been found that the influence of the magnetic field on the polaron self-energy and effective mass can be neglected as compared with the ones of the electric field. The results will be useful for further exploring the phonon-assisted electro-optical properties of wurtzite nanostructures.
期刊介绍：
Journal of Contemporary Physics (Armenian Academy of Sciences) is a journal that covers all fields of modern physics. It publishes significant contributions in such areas of theoretical and applied science as interaction of elementary particles at superhigh energies, elementary particle physics, charged particle interactions with matter, physics of semiconductors and semiconductor devices, physics of condensed matter, radiophysics and radioelectronics, optics and quantum electronics, quantum size effects, nanophysics, sensorics, and superconductivity.
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