Rotationally invariant exchange interaction: The case of paramagnetic iron

V. I. Anisimov, A. S. Belozerov, A. I. Poteryaev, I. Leonov

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)

Abstract

We present a generalization of the spin-fluctuation theory of magnetism which allows us to treat the full rotational invariance of the exchange interaction. The approach is formulated in terms of the local density approximation plus dynamical mean-field theory (LDA+DMFT), providing a systematic many-body treatment of the effect of spin-density fluctuations. This technique is employed to study the electronic and magnetic properties of paramagnetic α iron. Our result for the Curie temperature is in good agreement with experiment, while the calculations with the Ising-type exchange interaction yield almost twice the overestimated value.

Original languageEnglish
Article number035152
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume86
Issue number3
DOIs
Publication statusPublished - 31 Jul 2012
Externally publishedYes

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