Optical probe for anomalous Hall resonance in ferromagnets with spin chirality

  • 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.

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Author:S. Iguchi, S. Kumakura, Y. Onose, Sándor Bordács, István KézsmárkiORCiDGND, N. Nagaosa, Y. Tokura
Frontdoor URLhttps://opus.bibliothek.uni-augsburg.de/opus4/43728
Parent Title (English):Physical Review Letters
Publisher:American Physical Society (APS)
Year of first Publication:2009
Publishing Institution:Universität Augsburg
Release Date:2018/11/19
First Page:267206
Institutes:Mathematisch-Naturwissenschaftlich-Technische Fakultät
Mathematisch-Naturwissenschaftlich-Technische Fakultät / Institut für Physik
Mathematisch-Naturwissenschaftlich-Technische Fakultät / Institut für Physik / Lehrstuhl für Experimentalphysik V
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Licence (German):Deutsches Urheberrecht