Abstract
Consider a local exchange potential v(r) which depends on a set of orbitals {}. It is proven that v is the exact Kohn-Sham density-functional exchange potential, when {} is optimum, if and only if satisfies three specified conditions. Exchange potentials are presented which satisfy two of the conditions, one of which is satisfied neither by the original Slater potential nor by the local-density approximation.
- Received 12 December 1988
DOI:https://doi.org/10.1103/PhysRevLett.65.1036
©1990 American Physical Society