4f Contribution to Valence Band of Pb1-xRExS (RE = Eu,Gd) Studied by Resonant Photoemission

B.J. Kowalski, Z. Gołacki, E. Guziewicz, B.A. Orłowski Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warszawa, Poland J. Ghijsen Facultes Universitaires Notre-Dame de la Paix, Laboratoire Interdisciplinaire de Spectroscopie Electronique, 61 rue de Bruxelles, 5000 Namur, Belgium and R.L. Johnson Universität Hamburg, II Institut für Experimentalphysik, Luruper Chaussee 149, 22761 Hamburg 50, Germany

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Resonant photoemission experiments were carried out in order to reveal the contributions of partly filled Eu 4f7 and Gd 4f7 shells to the valence bands of Pb0.95Eu0.05S and Pb0.95Gd0.05S crystals. The coupling between these orbitals and the host electronic states is discussed.

DOI: 10.12693/APhysPolA.90.1035 PACS numbers: 71.25.Tn, 79.60.-i