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Zoekopdracht: faculteit: "FNWI" en publicatiejaar: "2003"

AuteursS.-L. Drechsler, Z. Huu, J. Malek, H. Rosner, R. Neudert, M. Knupfer, M.S. Golden, J. Fink
TitelX-ray absorption spectroscopy of CuO2 chains
TijdschriftJournal of Low Temperature Physics
FaculteitFaculteit der Natuurwetenschappen, Wiskunde en Informatica
Instituut/afd.FNWI: Van der Waals-Zeeman Institute (WZI)
TrefwoordenX-ray absorption spectroscopy; Electron structure; Nuclear spectra; Valency
SamenvattingThe electronic structure of various edge-shared chain compounds A1-xCuO2 (A=Ca,Sr,Ba) was studied by O-K and Cu-L3 x-ray absorption spectroscopy and exact diagonalizations techniques. The doping-dependent behaviour in these chains differs from that of conventional 2D Cu-O networks of cornershared CuO4 plaquettes due to the much smaller inter-plaquette hybridisation. This results in different final states in the Cu-L3 spectra and a strong reduction in the dynamic spectral weight transfer from the upper Hubbard band to the low energies in the O-K spectra. The spectra can be used to 'read-off' the Cu valency.
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