Anonymous @ on
Highly non-spherical heavy hole bands for bulk GaAs??
I calculated the band structure of bulk GaAs. The effective masses for the heavy holes were given as:
[100] 0.376848
[110] 0.657788
[111] 0.839029
I thought the heavy hole bands of GaAs were close to spherical??
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Yang Liu @ on
Hi,
The valence bands are, in most cases, very non-parabolic. Density-of-states effective masses for holes can be found in textbooks, but it refers to the average mass to use when calculating the charge densities. All the orbit-coupling parameters in tight-binding are optimized to reproduce effective masses, bandgaps and other quantities measured from experiments. The reference for GaAs hole effective masses can be found in the paper:
T. B. Boykin, G. Klimeck, R. C. Bowen, and F. Oyafuso,“Diagonal parameter shifts due to nearest-neighbor displacements in empirical tight-binding theory,” Physical Review B 66, 125207, 2002
and also the refences in this paper too.
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