Circularly polarized light induces an octupolar inverse Faraday effect and anisotropic multipolar exchange in 4d2/5d2 Mott insulators, opening a nonequilibrium phase space with tunable antiferro-octupolar, ferro-octupolar, and multipolar liquid states.
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XMCD measurements and ligand-field calculations indicate that ferro-octupolar order with ~1.5 meV exchange interaction is possible in the hidden-ordered state of Ba2CaOsO6.
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Light-driven octupolar inverse Faraday effect and multipolar order in Mott insulators
Circularly polarized light induces an octupolar inverse Faraday effect and anisotropic multipolar exchange in 4d2/5d2 Mott insulators, opening a nonequilibrium phase space with tunable antiferro-octupolar, ferro-octupolar, and multipolar liquid states.
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Possibility of ferro-octupolar order in Ba$_2$CaOsO$_6$ assessed by X-ray magnetic dichroism measurements
XMCD measurements and ligand-field calculations indicate that ferro-octupolar order with ~1.5 meV exchange interaction is possible in the hidden-ordered state of Ba2CaOsO6.