Gradient-corrected density-functional studies ofCaCuO2

Abstract
A search for an antiferromagnetic ground state in CaCuO2, using gradient-corrected local-spin-density functionals, is reported. It is found that, as with the local-spin-density approximation, a paramagnetic metallic ground state is predicted, in disagreement with experiment. The gradient corrections do, however, bring this material closer to an antiferromagnetic instability.