Mirror Protected Dirac Fermions on a Weyl Semimetal NbP Surface

Hao Zheng, Guoqing Chang, Shin Ming Huang, Cheng Guo, Xiao Zhang, Songtian Zhang, Jiaxin Yin, Su Yang Xu, Ilya Belopolski, Nasser Alidoust, Daniel S. Sanchez, Guang Bian, Tay Rong Chang, Titus Neupert, Horng Tay Jeng, Shuang Jia, Hsin Lin, M. Zahid Hasan