Affiliation: | 1.Department of Physics,University of Wuppertal,Wuppertal,Germany;2.E?tv?s University,Budapest,Hungary;3.Jülich Supercomputing Centre,Jülich,Germany;4.Department of Physics,University of Regensburg,Regensburg,Germany;5.Department of Physics,University of Houston,Houston,U.S.A. |