Sherman, V. [P:(DE-HGF)0] ; Astafiev, J. M. [P:(DE-HGF)0] ; Setter, N. [P:(DE-Juel1)VDB3121] ; Tagantsev, A. [P:(DE-Juel1)VDB3123] ; Vendik, O. [P:(DE-HGF)0] ; Hoffmann-Eifert, S. [P:(DE-Juel1)VDB3102] ; Böttger, U. [P:(DE-HGF)0] ; Waser, R. [P:(DE-Juel1)131022]