Gunkel, F. [P:(DE-Juel1)130677] ; Hoffmann-Eifert, S. [P:(DE-Juel1)130717] ; Heinen, R. A. [P:(DE-HGF)0] ; Christensen, D. V. [P:(DE-HGF)0] ; Chen, Y. Z. [P:(DE-HGF)0] ; Pryds, N. [P:(DE-HGF)0] ; Waser, R. [P:(DE-Juel1)131022] ; Dittmann, R. [P:(DE-Juel1)130620]