A Higashiya et al 2008 New J. Phys. 10 053033 doi:10.1088/1367-2630/10/5/053033
Significance of the inter-site Coulomb interaction between the O 2p and Cu 3d holes revealed by resonant inelastic x-ray scattering of Sr14Cu24O41
A Higashiya1,6, S Imada2, T Murakawa2, H Fujiwara2,5, S Kasai2, A Sekiyama2, S Suga2, K Okada3, M Yabashi1, K Tamasaku1, T Ishikawa1 and H Eisaki4
Show affiliationsWe have carried out resonant inelastic x-ray scattering (RIXS) measurements at the Cu K-edge on Sr14Cu24O41, which has two kinds of layers, namely, the ladder layer and the chain layer. The excitation from the Zhang–Rice singlet band to the upper Hubbard band (UHB) shows a large dispersion with a periodicity of the ladder layer. The excitation corresponding to the ligand-to-metal charge transfer is nearly dispersionless. Comparison between the RIXS data and theoretical calculations shows that the inter-site Coulomb interaction between the Cu 3d and O 2p holes plays a prominent role in the RIXS process. This interaction is expected to be important in the hole state in the ladder layer of this compound.
- PACS
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74.72.Jt Other cuprates, including Tl and Hg-based cuprates
71.45.Lr Charge-density-wave systems
71.45.Gm Exchange, correlation, dielectric and magnetic response functions, plasmons
- Subjects
- Dates
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Issue 5 (May 2008)
Received 11 February 2008
Published 28 May 2008
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Significance of the inter-site Coulomb interaction between the O 2p and Cu 3d holes revealed by resonant inelastic x-ray scattering of Sr14Cu24O41
A Higashiya et al 2008 New J. Phys. 10 053033
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