The Role of Correlations in the Magnetic Moment of MnSi

Details The Role of Correlations in the Magnetic Moment of MnSi The Role of Correlations in the Magnetic Moment of MnSi

2009-05-25

arxiv.org/abs/0905.4061v2

Physics

Condensed Matter

Strongly Correlated Electrons

7 pages, 6 figures, 2 tables; rewritten per referees comments

Scientific paper

We explored the anomalously low moment in MnSi found by experiment (~0.4 $\mu_{\text{B}}$/Mn) vs the moment predicted by density functional theory (~1.0 $\mu_{\text{B}}$/Mn). With the addition of a Hubbard-U correction, we found several solutions with lower moments. These lower moment solutions show an unusual magnetic order and a magnetic quadrupole moment. The behavior of the moment under pressure does not follow the experimental trend.

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