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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)...


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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10. Osbourn, G.C., Schirber, J.E., Drummond, T.J., Dawson, L.R., Doyle, B.L. and Fritz, I.J., Appl. Phys. Lett. 49, 731 (1986)
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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