Abstract

We examine the Fröhlich polaron problem in wurtzite nitride cylindrical nanowire embedded in a nonpolar matrix within the framework of the Lee–Low–Pines variational approach. The effects of the external electric and magnetic fields and quantum-size confinement on polaron self-energy and effective mass due to electron interactions with both quasiconfined and interface optical phonons are investigated. The numerical results obtained for wurtzite GaN material are discussed in comparison with the zinc-blende structure cylindrical nanowires. The estimation of contributions of different phonon modes reveal that interface optical phonons are much more important in narrow wires. It is found that the electric field has a relatively pronounced influence on the polaron self-energy and effective mass, while the effect of the magnetic field is small. The obtained results will be of importance in further study of the phonon-assisted electro-optical properties in wurtzite semiconductor low-dimensional structures.

Graphic abstract

中文翻译：

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外部电场和磁场对埋在非极性基质中的纤锌矿氮化物纳米线中极化子的影响

摘要

我们研究了在Lee–Low–Pines变分方法框架内嵌入非极性基质中的纤锌矿氮化物圆柱纳米线中的Fröhlich极化子问题。研究了外部电场和磁场以及量子大小的限制对极化子自能和有效质量的影响，这些极化子是由于与准限定声子和界面声子的电子相互作用而产生的。与锌-闪锌矿结构圆柱纳米线相比，讨论了纤锌矿GaN材料的数值结果。对不同声子模式贡献的估计表明，界面光学声子在窄导线中更为重要。发现电场对极化子的自能和有效质量有比较显着的影响，而磁场的影响很小。

图形摘要