Sonntag, Jens [P:(DE-Juel1)167238] ; Reichardt, S. [P:(DE-HGF)0] ; Wirtz, L. [P:(DE-HGF)0] ; Beschoten, Bernd [P:(DE-Juel1)178028] ; Katsnelson, M. I. [P:(DE-HGF)0] ; Libisch, F. [P:(DE-HGF)0] ; Stampfer, Christoph [P:(DE-Juel1)180322]