Affiliation: | (1) The Angström Laboratory, Department of Materials Chemistry, Uppsala University, Box 538, 75121 Uppsala, Sweden;(2) Department of General Physics and Laser Spectroscopy, University of Pécs, 7624 Pécs, Ifjúság útja 6, Hungary;(3) The Angstrom Laboratory, Department of Solid State Physics, Uppsala University, Box 534, 75121 Uppsala, Sweden |