VALENCE-BAND-SHAPE MODIFICATION DUE TO BAND COUPLING IN STRAINED QUANTUM-WELLS

Authors
VINA L MUNOZ L MESTRES N KOTELES ES GHITI A OREILLY EP BERTOLET DC LAU KM
Citation
L. Vina et al., VALENCE-BAND-SHAPE MODIFICATION DUE TO BAND COUPLING IN STRAINED QUANTUM-WELLS, Physical review. B, Condensed matter, 47(20), 1993, pp. 13926-13929
Citations number
24
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physical review. B, Condensed matter → ACNP
ISSN journal
01631829
Volume
47
Issue
20
Year of publication
1993
Pages
13926 - 13929
Database
ISI
SICI code
0163-1829(1993)47:20<13926:VMDTBC>2.0.ZU;2-B
Abstract
We have observed the strong dependence of the in-plane effective masse s of the heavy-hole and light-hole valence bands in quantum wells on t heir coupling. The magnitude of this interaction, which is a function of the energy separation of the two bands, was tuned by adjusting the magnitude of tensile strain and well width in GaAs1-yPy/Al0.35Ga0.65As quantum wells. A distinct increase of both the heavy- and light-hole masses is observed when the bands merge at k = 0, consistent with theo retical predictions.