First- principle calculations of magnetic interactions in correlated systems

Details First- principle calculations of magnetic interactions in correlated systems First- principle calculations of magnetic interactions in correlated systems

1999-04-29

arxiv.org/abs/cond-mat/9904428v1

Physics

Condensed Matter

Strongly Correlated Electrons

17 pages, 3 Postscript figures

Scientific paper

10.1103/PhysRevB.61.8906

We present a novel approach to calculate the effective exchange interaction parameters based on the realistic electronic structure of correlated magnetic crystals in local approach with the frequency dependent self energy. The analog of ``local force theorem'' in the density functional theory is proven for highly correlated systems. The expressions for effective exchange parameters, Dzialoshinskii- Moriya interaction, and magnetic anisotropy are derived. The first-principle calculations of magnetic excitation spectrum for ferromagnetic iron, with the local correlation effects from the numerically exact QMC-scheme is presented.

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