Optical probe for anomalous hall resonance in ferromagnets with spin chirality

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

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Abstract

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.

Original languageEnglish
Article number267206
JournalPhysical Review Letters
Volume103
Issue number26
DOIs
Publication statusPublished - Dec 31 2009

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chirality
Hall effect
conductivity
probes
magnetic monopoles
crystals

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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Optical probe for anomalous hall resonance in ferromagnets with spin chirality. / Iguchi, S.; Kumakura, S.; Onose, Y.; Bordács, S.; Kézsmárki, I.; Nagaosa, N.; Tokura, Y.

In: Physical Review Letters, Vol. 103, No. 26, 267206, 31.12.2009.

Research output: Contribution to journalArticle

Iguchi, S. ; Kumakura, S. ; Onose, Y. ; Bordács, S. ; Kézsmárki, I. ; Nagaosa, N. ; Tokura, Y. / Optical probe for anomalous hall resonance in ferromagnets with spin chirality. In: Physical Review Letters. 2009 ; Vol. 103, No. 26.
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