Evolution of unconventional surface state pairs in La-doped NdBi and NdSb.

The unconventional surface-state pairs that give rise to a new type of Fermi arcs and have spin-texture were observed in multiple AFM-ordered rare-earth monopnictides. Our earlier ARPES studies of this family of materials led us to the conclusion that the splitting of these states and their intensity scale with the magnetic moments of the rare-earth element. To check this, we perform angle-resolved photoemission spectroscopy measurements of NdBi and NdSb doped with non-magnetic lanthanum. Here, I present the results of this study. The observed changes in the electronic structure of these materials with doping confirm our earlier conclusions.