Anomalous Hall Effect and Magnetic Monopoles in Momentum-Space

2003/10/10 by Z. Fang, N. Nagaosa, K. S. Takahashi +7 · 4 citations
Physics and Astronomy · #cond-mat.str-el #cond-mat.mtrl-sci

paper · pdf · doi:10.1126/science.1089408

published as Science 302N5642:92-95,2003 · 4 figures, the supporting-online-materails are included

arxiv created 2003/10/10 · arxiv updated 2011/07/19

Abstract

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 ∼ 10¹⁶GeV. However, we show that the magnetic monopole can appear in the crystal-momentum space of solids in the accessible low energy region (∼0.1-1eV) in the context of the anomalous Hall effect. We report experimental results together with first-principles calculations on the ferromagnetic crystal SrRuO₃ that provide evidence for the magnetic monopole in the crystal-momentum space.

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