A three-dimensional magnetic topological phasecond-mat.mtrl-sci/ AuthorsIlya Belopolski, Daniel S. Sanchez, Guoqing Chang, Kaustuv Manna, Benedikt Ernst, Su-Yang Xu, Songtian S. Zhang, Hao Zheng, Jiaxin Yin, Bahadur Singhand 9 more authorsGuang Bian, Daniel Multer, Xiaoting Zhou, Shin-Ming Huang, Baokai Wang, Arun Bansil, Hsin Lin, Claudia Felser, M. Zahid Hasan/ AbstractWe use photoemission spectroscopy to discover the first topological magnet in three dimensions, the material Co$_2$MnGa.