paper

Effective Coulomb interaction in transition metals from constrained random-phase approximation

arXiv:1103.5593 · doi:10.1103/PhysRevB.83.121101

Abstract

The effective on-site Coulomb interaction (Hubbard ) between localized \textit{d} electrons in 3\textit{d}, 4\textit{d}, and 5\textit{d} transition metals is calculated employing a new parameter-free realization of the constrained random-phase approximation using Wannier functions within the full-potential linearized augmented-plane-wave method. The values lie between 1.5 and 5.7 eV and depend on the crystal structure, spin polarization, \textit{d} electron number, and \textit{d} orbital filling. On the basis of the calculated parameters, we discuss the strength of the electronic correlations and the instability of the paramagnetic state towards the ferromagnetic one for 3\textit{d} metals.

4 pages

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