Anomalous Hall Effect and Magnetic Monopoles in Momentum-Space

Details Anomalous Hall Effect and Magnetic Monopoles in Momentum-Space Anomalous Hall Effect and Magnetic Monopoles in Momentum-Space

2003-10-10

arxiv.org/abs/cond-mat/0310232v1

Science 302N5642:92-95,2003

Physics

Condensed Matter

Strongly Correlated Electrons

4 figures, the supporting-online-materails are included

Scientific paper

10.1126/science.1089408

Efforts to find the magnetic monopole in real space have been made in cosmic rays and in accelerators, but up to now there is no firm evidence for its existence due to the very heavy mass $\sim 10^{16}$GeV. However, we show that the magnetic monopole can appear in the crystal-momentum space of solids in the accessible low energy region ($\sim0.1-1$eV) in the context of the anomalous Hall effect. We report experimental results together with first-principles calculations on the ferromagnetic crystal SrRuO$_3$ that provide evidence for the magnetic monopole in the crystal-momentum space.

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