Na2IrO3 as a Novel Relativistic Mott Insulator with a 340-meV Gap
R. Comin, G. Levy, B. Ludbrook, Z.H. Zhu, C.N. Veenstra, J.A. Rosen, Y. Singh, P. Gegenwart, D. Stricker, J.N. Hancock, D. van der Marel, I.S. Elfimov, A. Damascelli. Phys. Rev. Lett. 109, 266406 (2012).