Four-coloured Spin-wave Excitations in Multiferroic Materials

Abstract

The optical magnetoelectric effect, which is an inherent attribute of the spin excitations in multiferroics, drastically changes their optical properties compared to conventional materials where light-matter interaction is expressed only by the dielectric permittivity and magnetic permeability. Our polarized absorption experiments performed on multiferroic Ca2CoSi2O7 and Ba2CoGe2O7 in the THz spectral range demonstrate that such magnetoeletric spin excitations show quadrochroism, i.e. they have different colours for all the four combinations of the two propagation directions (forward or backward) and the two orthogonal polarizations of a light beam. We found that quadrochroism can give rise to peculiar optical properties, such as one-way transparency and zero-reflection of these excitations, which can open a new horizon in photonics. One-way transparency is also related to the static magnetoelectric phenomena, hence, these optical studies can provide guidelines for the systematic synthesis of new materials with large dc magnetoelectric effect.

References in corpus (12)

• Origin of electromagnon excitations in \textit{R}MnO${}_3$
• Theory of electromagnon in the multiferroic Mn perovskites: Vital role of higher harmonic components of the spiral spin order
• Symmetry Conditions for Non-reciprocal Light Propagation in Magnetic Crystals
• Magnetoelectric Resonances and Predicted Microwave Diode Effect of Skyrmion Crystal in Multiferroic Chiral-Lattice Magnet
• Electromagnons in multiferroic RMn2O5 compounds and their microscopic origin
• Terahertz time-domain spectroscopy of electromagnons in multiferroic perovskite manganites
• Spin-stretching modes in anisotropic magnets: spin-wave excitations in the multiferroic Ba2CoGe2O7
• Gigantic magnetoelectric effect caused by magnetic-field-induced canted antiferromagnetic-paramagnetic transition in quasi-two-dimensional Ca${}_2$CoSi${}_2$O${}_7$ crystal
• Multiboson spin-wave theory for Ba2CoGe2O7, a spin-3/2 easy-plane Neel antiferromagnet with strong single-ion anisotropy
• Multiferroic properties of an åkermanite Sr${}_2$CoSi${}_2$O${}_7$ single crystal in high magnetic fields
• THz Magneto-electric atomic rotations in the chiral compound Ba${}_3$NbFe${}_3$Si${}_2$O${}_{14}$
• Magnetic and dielectric properties of A2CoSi2O7 (A=Ca, Sr, Ba) crystals

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• Electromagnon dispersion probed by inelastic x-ray scattering
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• Magneto- to electro-active transmutation of spin waves in ErMnO3
• Direct observation of spin-quadrupolar excitations in Sr${}_2$CoGe${}_2$O${}_7$ by high field ESR
• Microwave magnetochiral effect in Cu2OSeO3
• Giant directional birefringence in multiferroic ferroborate
• Possible coupling between magnons and phonons in multiferroic CaMn7O12
• Microwave Magneto-Chiral Effect in a Noncentro-symmetric Magnet CuB2O4
• Nonreciprocal directional dichroism at telecom wavelengths
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• Directional dichroism in the paramagnetic state of multiferroics: a case study of infrared light absorption in Sr2CoSi2O7 at high temperatures
• Microwave non-reciprocity of magnon excitations in a non-centrosymmetric antiferromagnet Ba${}_2$MnGe${}_2$O${}_7$
• Magnetic resonances of multiferroic TbFe${}_3$(BO${}_3$)${}_4$
• Microwave directional dichroism resonant with spin excitations in the polar ferromagnet GaV${}_4$S${}_8$
• Sign change of polarization rotation under either time or space inversion in magnetoelectric YbAl3(BO3)4
• Symmetry Analysis of Magnetoelectric Effects in Honeycomb Antiferromagnet Co4Nb2O9
• Magnetic anisotropy and exchange paths for octa- and tetrahedrally coordinated Mn${}^{2+}$ ions in the honeycomb multiferroic Mn${}_2$Mo${}_3$O${}_8$
• Selection rules and dynamic magnetoelectric effect of the spin waves in multiferroic BiFeO${}_3$
• Optical magnetoelectric effect in the polar honeycomb antiferromagnet Fe2Mo3O8
• In-situ electric field control of THz non-reciprocal directional dichroism in the multiferroic Ba${}_2$CoGe${}_2$O${}_7$
• Magnetic structure of the noncentrosymmetric magnet Sr2MnSi2O7 through irreducible representation and magnetic space group analyses
• Low-energy spin excitations in field-induced phases of the spin-ladder antiferromagnet BiCu${}_2$PO${}_6$
• Long-range order in arrays of composite and monolithic magneto-toroidal moments
• Curvilinear spin-wave dynamics beyond the thin-shell approximation: Magnetic nanotubes as a case study
• Magnetoelectric Effect Dependent on Electric Field Direction in a Pyroelectric Ferrimagnet CaBaCo${}_4$O${}_7$
• Mode splitting of spin waves in magnetic nanotubes with discrete symmetries
• Microwave One-way Transparency by Large Synthetic Motion of Magnetochiral Polaritons in Metamolecules
• Symmetry- and curvature effects on spin waves in vortex-state hexagonal nanotubes