Interface and confined optical phonons in wurtzite nanocrystals

2004/05/28 by Vladimir A. Fonoberov, Alexander A. Balandin · 1 citation
Materials Science · Physics and Astronomy · #Quantum Dots Synthesis And Properties #Silicon Nanostructures and Photoluminescence #ZnO doping and properties #cond-mat.mes-hall

paper · pdf · doi:10.1103/physrevb.70.233205

published as Phys. Rev. B 70, 233205 (2004) · 6 pages

arxiv created 2004/05/28 · openalex publication_date 2004/12/30 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We derive within the dielectric-continuum model an integral equation that defines interface and confined polar optical-phonon modes in nanocrystals with a wurtzite crystal structure. It is demonstrated theoretically that, while the frequency of confined polar optical phonons in zinc-blende nanocrystals is equal to that of the bulk crystal phonons, the confined polar optical phonons in wurtzite nanocrystals have a discrete spectrum of frequencies different from those of the bulk crystal. The calculated frequencies of confined polar optical phonons in wurtzite ZnO nanocrystals are found to be in an excellent agreement with the experimental resonant Raman-scattering spectra of spherical ZnO quantum dots.

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• Polar optical phonons in wurtzite spheroidal quantum dots: theory and application to ZnO and ZnO/MgZnO nanostructures

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