Effect of band anisotropy on electronic structure of PbS, PbSe, and PbTe quantum dots

Citation
Ge. Tudury et al., Effect of band anisotropy on electronic structure of PbS, PbSe, and PbTe quantum dots, PHYS REV B, 62(11), 2000, pp. 7357-7364
Citations number
32
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
01631829 → ACNP
Volume
62
Issue
11
Year of publication
2000
Pages
7357 - 7364
Database
ISI
SICI code
0163-1829(20000915)62:11<7357:EOBAOE>2.0.ZU;2-7
Abstract
We have calculated the electronic structure of spherical PbS, PbSe, and PbT e quantum dots using a four-band envelope-function formalism that accounts for band anisotropy. By comparing our results with an analytical calculatio n that assumes a spherical approximation of the (k) over right arrow.(p) ov er right arrow Hamiltonian, we show that the effects of band anisotropy are more pronounced for the excited states and increase with the confinement. We also show how the same technique can be applied to ellipsoidal quantum d ots.