Hole Band Mixing in CdS and CdSe Quantum Dots and Quantum Rods
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Scholar |
Altres documents de l'autoria: Planelles, Josep; Rajadell Viciano, Fernando; Climente, Juan I.
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Mostra el registre complet de l'elementcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/7013
comunitat-uji-handle3:10234/8638
comunitat-uji-handle4:
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http://dx.doi.org/10.1021/jp102086q |
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Títol
Hole Band Mixing in CdS and CdSe Quantum Dots and Quantum RodsData de publicació
2010Editor
American Chemical SocietyISSN
1932-7447Tipus de document
info:eu-repo/semantics/articleVersió de l'editorial
http://pubs.acs.org/doi/abs/10.1021/jp102086qVersió
info:eu-repo/semantics/publishedVersionParaules clau / Matèries
Resum
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. [-]
Publicat a
Journal of Physical Chemistry C, 114 , 18, p. 8337–8342Drets d'accés
© 2010 American Chemical Society
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