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Kurumaji T, Takahashi Y, Fujioka J, et al. Optical Magnetoelectric Resonance in a Polar Magnet (Fe,Zn)_{2}Mo_{3}O_{8} with Axion-Type Coupling. Phys Rev Lett. 2017;119(7):077206doi: 10.1103/PhysRevLett.119.077206.
Kurumaji, T., Takahashi, Y., Fujioka, J., Masuda, R., Shishikura, H., Ishiwata, S., & Tokura, Y. (2017). Optical Magnetoelectric Resonance in a Polar Magnet (Fe,Zn)_{2}Mo_{3}O_{8} with Axion-Type Coupling. Physical review letters, 119(7), 077206. https://doi.org/10.1103/PhysRevLett.119.077206
Kurumaji, T, et al. "Optical Magnetoelectric Resonance in a Polar Magnet (Fe,Zn)_{2}Mo_{3}O_{8} with Axion-Type Coupling." Physical review letters vol. 119,7 (2017): 077206. doi: https://doi.org/10.1103/PhysRevLett.119.077206
Kurumaji T, Takahashi Y, Fujioka J, Masuda R, Shishikura H, Ishiwata S, Tokura Y. Optical Magnetoelectric Resonance in a Polar Magnet (Fe,Zn)_{2}Mo_{3}O_{8} with Axion-Type Coupling. Phys Rev Lett. 2017 Aug 18;119(7):077206. doi: 10.1103/PhysRevLett.119.077206. Epub 2017 Aug 18. PMID: 28949678.
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Phys Rev Lett. 2017 Aug 18;119(7):077206. doi: 10.1103/PhysRevLett.119.077206. Epub 2017 Aug 18.

Optical Magnetoelectric Resonance in a Polar Magnet (Fe,Zn)_{2}Mo_{3}O_{8} with Axion-Type Coupling.

Physical review letters

T Kurumaji, Y Takahashi, J Fujioka, R Masuda, H Shishikura, S Ishiwata, Y Tokura

Affiliations

  1. RIKEN Center for Emergent Matter Science (CEMS), Wako 351-0198, Japan.
  2. Quantum-Phase Electronics Center (QPEC) and Department of Applied Physics, The University of Tokyo, Tokyo 113-8656, Japan.
  3. PRESTO, Japan Science and Technology Agency, Chiyoda, Tokyo 102-8666, Japan.

PMID: 28949678 DOI: 10.1103/PhysRevLett.119.077206

Abstract

We report the polarization rotation of terahertz light resonant with the magnetoelectric (ME) spin excitation in the multiferroic (Fe,Zn)_{2}Mo_{3}O_{8}. This resonance reflects the frequency dispersion of the diagonal ME susceptibility (axion term), with which we quantitatively reproduce the thermal and magnetic-field evolution of the observed polarization rotation spectra. The application of the sum rule on the extrapolated dc value of the spectral weight of the ME oscillator provides insight into the dc linear ME effect. The present finding highlights a novel optical functionality of spin excitations in multiferroics that originates from diagonal ME coupling.

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