External electric and magnetic field effects on the polaron in a wurtzite nitride nanowire embedded in a nonpolar matrix

Anna L. Asatryan (), Ashot H. Movsisyan and Arshak L. Vartanian ()
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Anna L. Asatryan: Yerevan State University
Ashot H. Movsisyan: Yerevan State University
Arshak L. Vartanian: Yerevan State University

The European Physical Journal B: Condensed Matter and Complex Systems, 2021, vol. 94, issue 3, 1-8

Abstract: 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

Date: 2021
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DOI: 10.1140/epjb/s10051-021-00071-5

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