Observation of Fermi arc surface states in a topological metal

Su Yang Xu, Chang Liu, Satya K. Kushwaha, Raman Sankar, Jason W. Krizan, Ilya Belopolski, Madhab Neupane, Guang Bian, Nasser Alidoust, Tay Rong Chang, Horng Tay Jeng, Cheng Yi Huang, Wei Feng Tsai, Hsin Lin, Pavel P. Shibayev, Fang Cheng Chou, Robert J. Cava, M. Zahid Hasan