Hole Band Mixing in CdS and CdSe Quantum Dots and Quantum Rods
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Other documents of the author: Planelles, Josep; Rajadell Viciano, Fernando; Climente, Juan I.
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Show full item recordcomunitat-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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Title
Hole Band Mixing in CdS and CdSe Quantum Dots and Quantum RodsDate
2010Publisher
American Chemical SocietyISSN
1932-7447Type
info:eu-repo/semantics/articlePublisher version
http://pubs.acs.org/doi/abs/10.1021/jp102086qVersion
info:eu-repo/semantics/publishedVersionSubject
Abstract
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. [-]
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Journal of Physical Chemistry C, 114 , 18, p. 8337–8342Rights
© 2010 American Chemical Society
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