Vladimir A Fonoberov and Alexander A Balandin 2005 J. Phys.: Condens. Matter 17 1085 doi:10.1088/0953-8984/17/7/003
Vladimir A Fonoberov and Alexander A Balandin
Show affiliationsPolar 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).
68.65.Hb Quantum dots (patterned in quantum wells)
78.30.-j Infrared and Raman spectra
63.22.-m Phonons or vibrational states in low-dimensional structures and nanoscale materials
Condensed matter: electrical, magnetic and optical
Surfaces, interfaces and thin films
Issue 7 (23 February 2005)
Received 10 December 2004, in final form 12 January 2005
Published 4 February 2005
Vladimir A Fonoberov and Alexander A Balandin 2005 J. Phys.: Condens. Matter 17 1085
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