Topological phase diagram and saddle point singularity in a tunable topological crystalline insulator

Madhab Neupane, Su Yang Xu, R. Sankar, Q. Gibson, Y. J. Wang, I. Belopolski, N. Alidoust, G. Bian, P. P. Shibayev, D. S. Sanchez, Y. Ohtsubo, A. Taleb-Ibrahimi, S. Basak, W. F. Tsai, H. Lin, Tomasz Durakiewicz, R. J. Cava, A. Bansil, F. C. Chou, M. Z. Hasan