2004/11/30 by Vladimir A. Fonoberov, Vladimir A Fonoberov, Alexander A. Balandin +1
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:10.1088/0953-8984/17/7/003
published as J. Phys.: Condens. Matter 17, 1085 (2005) · 11 pages
arxiv created 2004/11/30 · openalex publication_date 2005/02/05 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
Polar optical-phonon modes are derived analytically for spheroidal quantum dots with wurtzite crystal structure. The developed theory is applied to freestanding spheroidal ZnO quantum dots and to spheroidal ZnO quantum dots embedded into a MgZnO crystal. The wurtzite (anisotropic) quantum dots are shown to have strongly different polar optical-phonon modes in comparison with zincblende (isotropic) quantum dots. The obtained results allow one to explain and accurately predict phonon peaks in the Raman spectra of wurtzite nanocrystals, nanorods (prolate spheroids), and epitaxial quantum dots (oblate spheroids).