Unraveling the nature of charge excitations in La2CuO4 with momentum-resolved Cu K-edge resonant inelastic x-ray scattering

C. C. Chen, B. Moritz, F. Vernay, J. N. Hancock, S. Johnston, C. J. Jia, G. Chabot-Couture, M. Greven, I. Elfimov, G. A. Sawatzky, T. P. Devereaux

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Abstract

The results of model calculations using exact diagonalization reveal the orbital character of states associated with different Raman loss peaks in Cu K-edge resonant inelastic x-ray scattering (RIXS) from La2CuO4. The model includes electronic orbitals necessary to highlight the nonlocal Zhang-Rice singlet, charge transfer, and d-d excitations, as well as states with apical oxygen 2pz character. The dispersion of these excitations is discussed with prospects for resonant final state wave-function mapping. A good agreement with experiments emphasizes the substantial multiorbital character of RIXS profiles in the energy transfer range 1-6 eV.

Original languageEnglish (US)
Article number177401
JournalPhysical review letters
Volume105
Issue number17
DOIs
StatePublished - Oct 18 2010

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