Bimagnon studies in cuprates with resonant inelastic x-ray scattering at the O K edge. I. Assessment on La2CuO4 and comparison with the excitation at Cu L-3 and Cu K edges (Articolo in rivista)

Type
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  • Bimagnon studies in cuprates with resonant inelastic x-ray scattering at the O K edge. I. Assessment on La2CuO4 and comparison with the excitation at Cu L-3 and Cu K edges (Articolo in rivista) (literal)
Anno
  • 2012-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1103/PhysRevB.85.214527 (literal)
Alternative label
  • V. Bisogni1;2,? L. Simonelli1, L. J. P. Ament3, F. Forte4, M. Moretti Sala5,y M. Minola5, S. Huotari1;6, J. van den Brink2, G. Ghiringhelli5, N. B. Brookes1, and L. Braicovich5 (2012)
    Bimagnon studies in cuprates with resonant inelastic x-ray scattering at the O K edge. I. Assessment on La2CuO4 and comparison with the excitation at Cu L-3 and Cu K edges
    in Physical review. B, Condensed matter and materials physics
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • V. Bisogni1;2,? L. Simonelli1, L. J. P. Ament3, F. Forte4, M. Moretti Sala5,y M. Minola5, S. Huotari1;6, J. van den Brink2, G. Ghiringhelli5, N. B. Brookes1, and L. Braicovich5 (literal)
Pagina inizio
  • 214527 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 85 (literal)
Rivista
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  • 9 (literal)
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  • 21 (literal)
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  • 1 European Synchrotron Radiation Facility - Bo^?te Postale 220, F-38043 Grenoble, France 2 Leibniz Institute for Solid State and Materials Research IFW Dresden, P.O. Box 270116, D-01171 Dresden, Germany 3 Instituut Lorenz for Theoretical Physics, Universiteit Leiden - P.O. Box 9506, 2300 RA Leiden, The Netherland 4 CNR-SPIN and Dipartimento di Fisica \E. R. Caianiello\", Universit?a di Salerno - I-84084 Fisciano, Salerno, Italy 5 CNR-SPIN, Dipartimento di Fisica, Politecnico di Milano - Piazza Leonardo da Vinci 32, 20133 Milano, Italy and 6 Department of Physics, P.O. Box 64, University of Helsinki, FI-00014 Helsinki, Finland (literal)
Titolo
  • Bimagnon studies in cuprates with resonant inelastic x-ray scattering at the O K edge. I. Assessment on La2CuO4 and comparison with the excitation at Cu L-3 and Cu K edges (literal)
Abstract
  • We assess the capabilities of magnetic Resonant Inelastic X-ray Scattering (RIXS) at the O K edge in undoped cuprates by taking La2CuO4 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 ngerprints of bimagnon in the O K edge RIXS spectra. These are a dominant peak around 450 meV, the almost complete absence of dispersion both with and polarization and the almost constant intensity vs. the transferred momentum with polarization. This behavior is quite different from Cu L3 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 L3 edge that we present. The Cu L3 bimagnon spectra and those at 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. (literal)
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