Valence-band warping in tight-binding models

Citation
Tb. Boykin et al., Valence-band warping in tight-binding models, PHYS REV B, 59(11), 1999, pp. 7301-7304
Citations number
15
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B-CONDENSED MATTER
ISSN journal
0163-1829 → ACNP
Volume
59
Issue
11
Year of publication
1999
Pages
7301 - 7304
Database
ISI
SICI code
0163-1829(19990315)59:11<7301:VWITM>2.0.ZU;2-6
Abstract
The spin-orbit nearest-neighbor sp(3)s* model is widely believed able to re produce accurately the valence bands of most m-V and group-IV semiconductor s, essential for modeling the in-plane dispersion of valence- and inter-ban d quantum heterostructures. To check this belief, we study valence-band war ping in the spin-orbit sp(3)s* model including interactions up to second-ne arest-neighbor, providing exact, analytic formulas for the [110] and [111] light- and heavy-hole masses; Surprisingly, we find that the second-nearest -neighbor model offers significantly more flexibility in fitting these mass es independently of those along [001] than does the nearest-neighbor model. [S0163-1829(99)10007-9].