Liu, Chao [P:(DE-HGF)0] ; Du, Xiaoyan [P:(DE-Juel1)180633] ; Gao, Shuai [P:(DE-HGF)0] ; Classen, Andrej [P:(DE-Juel1)180634] ; Osvet, Andres [P:(DE-HGF)0] ; He, Yakun [P:(DE-HGF)0] ; Mayrhofer, Karl [P:(DE-Juel1)168125] ; Li, Ning [P:(DE-Juel1)180778] ; Brabec, Christoph J. [P:(DE-Juel1)176427]