Chang Liu^1,2, Guang Bian¹, Tay-Rong Chang³, Kedong Wang², Su-Yang Xu¹, Ilya Belopolski¹, Irek Miotkowski⁴, Helin Cao⁴, Koji Miyamoto⁵, Chaoqiang Xu⁶, Christian E. Matt⁷, Thorsten Schmitt⁷, Nasser Alidoust¹, Madhab Neupane¹, Horng-Tay Jeng³, Hsin Lin⁸, Arun Bansil⁹, Vladimir N. Strocov⁷, Mark Bissen¹⁰, Alexei V. Fedorov¹¹, Xudong Xiao^6,12, Taichi Okuda⁵, Yong P. Chen⁴, and M. Zahid Hasan¹

• ¹Joseph Henry Laboratory and Department of Physics, Princeton University, Princeton, New Jersey 08544, USA
• ²Department of Physics, South University of Science and Technology of China, Shenzhen, Guangdong 518055, China
• ³Department of Physics, National Tsing Hua University, Hsinchu 30013, Taiwan
• ⁴Department of Physics, Purdue University, West Lafayette, Indiana 47907, USA
• ⁵Hiroshima Synchrotron Radiation Center, Hiroshima University, 2-313 Kagamiyama, Higashi-Hiroshima 739-0046, Japan
• ⁶Department of Physics, The Chinese University of Hong Kong, Hong Kong, China
• ⁷Swiss Light Source, Paul Scherrer Institut, CH-5232 Villigen, Switzerland
• ⁸Graphene Research Centre and Department of Physics, National University of Singapore, Singapore 117542
• ⁹Department of Physics, Northeastern University, Boston, Massachusetts 02115, USA
• ¹⁰Synchrotron Radiation Center, University of Wisconsin-Madison, 3731 Schneider Drive, Stoughton, Wisconsin 53589, USA
• ¹¹Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94305, USA
• ¹²Center for Photovoltaics and Solar Energy, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China