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

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

2011-03-29

arxiv.org/abs/1103.5593v1

Phys. Rev. B 83, 121101(R) (2011)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages

Scientific paper

The effective on-site Coulomb interaction (Hubbard $U$) 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 $U$ 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 $U$ 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.

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