Hole Band Mixing in CdS and CdSe Quantum Dots and Quantum Rods
Impacto
Scholar |
Otros documentos de la autoría: Planelles, Josep; Rajadell Viciano, Fernando; Climente, Juan I.
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Mostrar el registro completo del ítemcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/7013
comunitat-uji-handle3:10234/8638
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http://dx.doi.org/10.1021/jp102086q |
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Título
Hole Band Mixing in CdS and CdSe Quantum Dots and Quantum RodsFecha de publicación
2010Editor
American Chemical SocietyISSN
1932-7447Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
http://pubs.acs.org/doi/abs/10.1021/jp102086qVersión
info:eu-repo/semantics/publishedVersionPalabras clave / Materias
Resumen
Using a six-band k·p Hamiltonian for wurtzite lattice, we study the hole ground state symmetry and composition in spherical quantum dots and elongated quantum rods made of CdS and CdSe. The ground state crossovers ... [+]
Using a six-band k·p Hamiltonian for wurtzite lattice, we study the hole ground state symmetry and composition in spherical quantum dots and elongated quantum rods made of CdS and CdSe. The ground state crossovers which occur when changing the nanocrystal size and shape are well understood in terms of hole band mixing. Contrary to previous belief, the quantum rod ground state crossover with increasing length is shown not to occur at a fixed aspect ratio. The geometry and composition that maximize the spin purity and the intensity of linearly polarized light emission are elucidated. The six-band wurtzite Hamiltonian results for CdSe are compared to those obtained with quasi-cubic four-band and one-band Hamiltonians, and the performance of these simplified Hamiltonians is discussed. [-]
Publicado en
Journal of Physical Chemistry C, 114 , 18, p. 8337–8342Derechos de acceso
© 2010 American Chemical Society
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