O Šipr et al 2009 J. Phys.: Condens. Matter 21 255401 doi:10.1088/0953-8984/21/25/255401
O Šipr1, F Rocca2 and P Fornasini3
Show affiliationsCu K-edge x-ray absorption near-edge structure (XANES) spectra of trigonal (3R) CuScO2 and CuLaO2 and of hexagonal (2H) CuScO2 were investigated experimentally and theoretically, in order to study differences between spectra of isostructural and isoelectronic compounds. Significant differences were found in the Cu K-edge XANES of 3R CuScO2 and 3R CuLaO2; these differences can be understood by considering the calculated polarization dependence of the XANES spectra and the differences between the phaseshifts of Sc and La. Spectra of the 3R and 2H polytypes of CuScO2 differ only weakly and the difference originates from the long-range order. The pre-edge peak around 8980 eV is generated by the same mechanism as the pre-edge peak in Cu2O, i.e. involving scattering by the Cu atoms in the plane which is perpendicular to the O–Cu–O axis.
Issue 25 (24 June 2009)
Received 19 February 2009, in final form 6 May 2009
Published 1 June 2009
O Šipr et al 2009 J. Phys.: Condens. Matter 21 255401
O Šipr et al 2007 J. Phys.: Condens. Matter 19 446205
O Šipr et al 2007 J. Phys.: Condens. Matter 19 096203
A M Bychkov and T M Stace 2007 Nanotechnology 18 185403
A Tracz et al 2007 Nanotechnology 18 485303
G Ketteler et al 2008 J. Phys.: Condens. Matter 20 184024
S Yamamoto et al 2008 J. Phys.: Condens. Matter 20 184025
D. Backman et al. 2009 ApJ 690 1522
Vandana Desai et al. 2009 ApJ 700 1190
Vandana Desai et al. 2008 ApJ 679 1204