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Direct Observation of Valence-Band Mixing in GaAs/GaPAs Strained-Layer Superlattices

Published online by Cambridge University Press:  26 February 2011

E. D. Jones ,
R. M. Biefeld ,
I. J. Fritz ,
P. L. Gourley ,
G. C. Osbourn ,
J. E. Schirber ,
D. Heiman  and
S. Foner
E. D. Jones
Affiliation:
Sandia National Laboratories, Albuquerque, NM 87185
R. M. Biefeld
Affiliation:
Sandia National Laboratories, Albuquerque, NM 87185
I. J. Fritz
Affiliation:
Sandia National Laboratories, Albuquerque, NM 87185
P. L. Gourley
Affiliation:
Sandia National Laboratories, Albuquerque, NM 87185
G. C. Osbourn
Affiliation:
Sandia National Laboratories, Albuquerque, NM 87185
J. E. Schirber
Affiliation:
Sandia National Laboratories, Albuquerque, NM 87185
D. Heiman
Affiliation:
Francis Bitter National Magnet Laboratory, Massachusetts Institute of Technology, Cambridge, MA 02139
S. Foner
Affiliation:
Francis Bitter National Magnet Laboratory, Massachusetts Institute of Technology, Cambridge, MA 02139
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Abstract

Low-temperature magneto-luminescence studies are used to examine the in-plane valence-band dispersion in GaAs/GaPAs strained-layer-superlattice structures. The results provide a direct observation of valence-band mixing effects in strained-layer systems.

Theoretical and experimental studies of the effect of valence-band mixing upon the magneto-transport properties and magneto-luminescence data for GaAs/AlGaAs latticed-matched superlattices have been recently reported.[1–] Due to the presence of the 2D-quantum well, the valence-band degeneracy between the light-hole and heavy-hole bands at is removed. These studies show, however, that the lowest energy valence-band mass is still strongly dependent upon due to valence-band mixing. On the other hand, because of the large biaxial compression in strained-layer-super lattices (SLS), valence-band mixing effects should be minimal.[8–9] Recent magneto-transport measurements[10] on p-type InGaAs/GaAs SLS structures have provided information regarding nonparabolic valence-bands in these structures.

Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 77: Symposium D – Interfaces, Superlattices, and Thin Films , 1986 , 467
Copyright
Copyright © Materials Research Society 1987

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References

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