Fe K-resonant 2p photoemission in Fe 2 0 3 P. Le Fèvre 1 , H. Magnan 2 , D. Chandesris 3 , J. Jupille 4 , S. Bourgeois 5 , A. Barbier 2 and W. Drube 6 1 LURE, CNRS-MENR, Bât. 209d, Université Paris Sud, BP 34, 91898 Orsay cedex, France 2 SPCSI, CEA, 91191 Gif sur Yvette cedex, France 3 SOLEIL, L’Orme des Merisiers, Saint Aubin, BP48, 91192 Gif sur Yvette cedex, France 4 GPS, CNRS-Universités Paris 6 et 7, 2 place Jussieu, 75251 Paris cedex 05, France 5 LRRS,CNRS-Université de Bourgogne, BP47870, 21078 Dijon cedex, France 6 HASYLAB / DESY, Notkestrasse 85, 22603 Hamburg, Germany Can we learn more from resonant spectroscopy than from an ordinary absorption experiment? This question has been extensively addressed since resonant fluorescence and resonant Auger measurements can be routinely performed at third generation synchrotron radiation sources. Resonant fluorescence [1] or resonant Auger [2] can be used to obtain absorption spectra beyond the limitation of the intrinsic core hole lifetime broadening in favourable cases, or to detect quadrupolar transitions towards localized empty states [3,4]. Resonant spectroscopies thus unquestionably yield additional information on the absorption edge profile, allowing to unravel the contributions of individual final states. Unlike Auger or fluorescence spectroscopy, resonant photoemission has not yet been used for this purpose. In such an experiment, photoemission spectra are recorded for photon energies around an absorption edge. Autoionisation processes may occur and interfere with direct photoemission [5] which leads to intensity variations of the photoemission lines. The interpretation is not as straightforward as for Auger or fluorescence measurements, since autoionisation is only detected through these interferences. Furthermore, resonant photoemission experiments are usually performed only on the valence band at very shallow absorption edges. Nevertheless, it has been demonstrated that resonant photoemission results help to understand the fine-structure of absorption edges at deep core level thresholds in complex systems [6]. The aim of the current experiment is to obtain additional information on the physical processes arising at the K-absorption threshold of a 3d element charge-transfer oxide, Fe 2 O 3 , by resonant Fe 2p photoemission. The sample was a 12 nm Fe 2 O 3 film deposited using an iron evaporator in an atomic oxygen plasma onto a Pt(111) single crystal [8]. The deposited film shows the spectroscopic fingerprints (Fe K- edge and Fe 2p core level line shape) of bulk Fe 2 O 3 . It was preferred to use thin film instead of a bulk Fe 2 O 3 crystal to avoid charging effects. Figure 1: Fe K-edge in Fe 2 0 3 . For reference, the photon energy was set to zero at the maximum position.