Gengzhe Shen1, Bohua Chen1, Tianlong Liang1, Zhihao Liu1, Sirou Zhao1, Junyan Liu1, Chi Zhang1, Weijia Yang1, Yiliang Wang2, and Xin He1,2,*
1 School of Applied Physics and Materials, Wuyi University, Jiangmen, Guangdong, 529020 P. R. China
2 Institute for Mechanical Process Engineering and Mechanics, Karlsruhe Institute of Technology (KIT), Karlsruhe, 76131 Germany