Optical probe for anomalous hall resonance in ferromagnets with spin chirality

Satoshi Iguchi, S. Kumakura, Yoshinori Onose, S. Bordács, I. Kézsmárki, N. Nagaosa, Y. Tokura

研究成果: Article

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We have investigated the infrared optical Hall conductivity, σxy(ω) for band-filling-controlled ferromagnetic crystals of Nd2Mo2O7, revealing the dynamical properties of their anomalous Hall effect (AHE). A resonant structure and its systematic filling dependence were observed in the Hall conductivity spectra in the midinfrared region (typically at 0.1 eV), while similar effects were not discerned in the diagonal (longitudinal or ordinary) conductivity spectra. This property of σxy(ω) provides crucial and essential information to understand the microscopic mechanism of AHE including its dc limit. Specifically, the interband transition at the magnetic-monopole-like band-anticrossing point, which is split by spin chirality, is the dominant source in AHE.

元の言語English
記事番号267206
ジャーナルPhysical Review Letters
103
発行部数26
DOI
出版物ステータスPublished - 2009 12 31
外部発表Yes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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