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

  • E. D. Jones (a1), R. M. Biefeld (a1), I. J. Fritz (a1), P. L. Gourley (a1), G. C. Osbourn (a1), J. E. Schirber (a1), D. Heiman (a2) and S. Foner (a2)...

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.

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11. Gourley, P.J., Hohimer, J.P. and Biefeld, R.M., Appl. Phys. Lett. 47, 552 (1985)
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13. Jones, E.D., Ackermann, H., Schirber, J.E., Drummond, T.J., Dawson, L.R. and Fritz, I.J., Appl. Phys. Lett. 47, 492 (1985)
14. Biefeld, R.M., Osbourn, G.C., Gourley, P.L. and Fritz, I.J., J. Electron. Mater. 12, 903 (1983)

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