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arxiv: 0906.0907 · v1 · pith:UTNTISKHnew · submitted 2009-06-04 · ❄️ cond-mat.mtrl-sci

Spin-induced optical second harmonic generation in the centrosymmetric magnetic semiconductors EuTe and EuSe

B. Kaminski , M. Lafrentz , R. V. Pisarev , D. R. Yakovlev , V. V. Pavlov , V.A. Lukoshkin , A. B. Henriques , G. Springholz
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G. Bauer E. Abramof P. H. O. Rappl M.Bayer
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classification ❄️ cond-mat.mtrl-sci
keywords magneticcentrosymmetricgenerationopticalspin-inducedeuseeuteharmonic
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Spectroscopy of the centrosymmetric magnetic semiconductors EuTe and EuSe reveals spin-induced optical second harmonic generation (SHG) in the band gap vicinity at 2.1-2.4eV. The magnetic field and temperature dependence demonstrates that the SHG arises from the bulk of the materials due to a novel type of nonlinear optical susceptibility caused by the magnetic dipole contribution combined with spontaneous or induced magnetization. This spin-induced susceptibility opens access to a wide class of centrosymmetric systems by harmonics generation spectroscopy.

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