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Research Highlight

By Beam Diffraction In Lamno, Q. Shen, G. Sawatzky, I. Elfimov, K. D. Finkelstein and R. Colella


In conventional X-ray diffraction the beam scatters from all electrons in the unit cell, but in resonant diffraction at a forbidden reflection only electrons involved in the electronic transition, near an atomic absorption edge, contribute to the intensity. To get intensity at a space-group forbidden reflection, the atomic resonance must somehow distinguish scattering from otherwise identical atoms. Our work addresses the question, “Can an experiment distinguish between several models of electronic structure, when each predicts resonant diffraction at forbidden reflections? ” The system is a crystal of orthorhombic LaMnO 3 for which a strong forbidden reflection was observed at the Mn K absorption edge [1]

Year: 2013
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