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• W1993999535 abstract "We assess the capabilities of magnetic resonant inelastic x-ray scattering (RIXS) at the O $K$ edge in undoped cuprates by taking La${}_{2}$CuO${}_{4}$ as a benchmark case, based on a series of RIXS measurements that we present here. By combining the experimental results with basic theory we point out the fingerprints of bimagnon excitation in the O $K$ edge RIXS spectra. These are a dominant peak around 450 meV, the almost complete absence of dispersion both with $ensuremath{pi}$ and $ensuremath{sigma}$ polarization, and the almost constant intensity vs the transferred momentum with $ensuremath{sigma}$ polarization. This behavior is quite different from Cu ${L}_{3}$ edge RIXS giving a strongly dispersing bimagnon tending to zero at the center of the Brillouin zone. This is clearly shown by RIXS measurements at the Cu ${L}_{3}$ edge that we present. The Cu ${L}_{3}$ bimagnon spectra and those at the Cu $K$ edge---both from the literature and from our data---however, have the same shape. These similarities and differences are understood in terms of different sampling of the bimagnon continuum. This panorama points out the unique possibilities offered by O $K$ RIXS in the study of magnetic excitations in cuprates near the center of the BZ." @default.
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• W1993999535 date "2012-06-25" @default.
• W1993999535 modified "2023-09-23" @default.
• W1993999535 title "Bimagnon studies in cuprates with resonant inelastic x-ray scattering at the O<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mi>K</mml:mi></mml:math>edge. I. Assessment on La<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:msub><mml:mrow /><mml:mn>2</mml:mn></mml:msub></mml:math>CuO<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:msub><mml:mrow /><mml:mn>4</mml:mn></mml:msub></mml:math>and comparison …" @default.
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• W1993999535 doi "https://doi.org/10.1103/physrevb.85.214527" @default.
• W1993999535 hasPublicationYear "2012" @default.
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