Unoccupied electronic structure of TiOCl studied using x-ray absorption near-edge spectroscopy.

  title={Unoccupied electronic structure of TiOCl studied using x-ray absorption near-edge spectroscopy.},
  author={Sven Glawion and Maurits W. Haverkort and G. Berner and Mark Hoinkis and Gianina Gavrila and Roberto Kraus and Martin Knupfer and Michael Sing and Ralph Claessen},
  journal={Journal of physics. Condensed matter : an Institute of Physics journal},
  volume={24 25},
We study the unoccupied electronic structure of the spin-1/2 quantum magnet TiOCl using x-ray absorption near-edge spectroscopy (XANES) at the Ti L and O K edges. We acquire data both in total electron and fluorescence yield modes (TEY and FY, respectively). While only the latter allows us to access the unconventional low-temperature spin-Peierls (SP) phase of TiOCl, the signal is found to suffer from significant self-absorption in this case. Nevertheless, we conclude from FY data that effects… 
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