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Polarization-analyzed resonant inelastic x-ray scattering of the orbital excitations in KCuF3

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arxiv 1008.0682 v2 pith:3C7EW2SD submitted 2010-08-04 cond-mat.str-el

classification cond-mat.str-el
keywords excitationsorbitalpolarizationdependenceinelastickcuf3resonantrixs
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We report a Cu K-edge resonant inelastic x-ray scattering (RIXS) study of orbital excitations in KCuF3 . By performing the polarization analysis of the scattered photons, we disclose that the excitation between the eg orbitals and the excitations from t2g to eg exhibit distinct polarization dependence. The polarization dependence of the respective excitations is interpreted based on a phenomenological consideration of the symmetry of the RIXS process that yields a necessary condition for observing the excitations. In addition, we show that the orbital excitations are dispersionless within our experimental resolution.

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