What question did this study set out to answer?

The aim is to compare the valence charge densities of bulk silicon calculated using different types of pseudopotentials.

Semiconductor Charge Densities with Hard-Core and Soft-Core Pseudopotentials

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Compares valence charge densities of silicon using various pseudopotentials, indicating notable consistency among them.

The aim is to compare the valence charge densities of bulk silicon calculated using different types of pseudopotentials.
Calculated bulk silicon charge densities in a parallel manner using three pseudopotential types: traditional weak, strongly repulsive core, and full potential.
Compared the charge densities to analyze the agreement and effects on bond-charge shape.
The charge densities from the strongly repulsive core and full potential methods show excellent agreement.
The traditional weak pseudopotential results reveal a somewhat modified bond-charge shape compared to the other two.

D. R. Hamann (1979) studied this question.

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