Directional effects of antiferromagnetic ordering on the electronic structure in NdSb

Abstract

The recent discovery of unconventional surface state pairs, which give rise to Fermi arcs and spin textures, in antiferromagnetically ordered NdBi raised the interest in rare-earth monopnictides. Several scenarios of antiferromagnetic order have been suggested to explain the origin of these states with some of them being consistent with the presence of non-trivial topologies. In this study, we use angle-resolved photoemission spectroscopy (ARPES) and density-functional-theory (DFT) calculations to investigate the electronic structure of NdSb. We found the presence of distinct domains that have different electronic structure at the surface. These domains correspond to different orientations of magnetic moments in the AFM state with respect to the surface. We demonstrated remarkable agreement between DFT calculations and ARPES that capture all essential changes in the band structure caused by transition to a magnetically ordered state.

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Cited by in corpus (7)

• Antiferromagnetic topological insulator with selectively gapped Dirac cones
• Unusual surface states associated with the PT-symmetry breaking and antiferromagnetic band folding in NdSb
• Unexpected changes in the band structure within AFM1 state of CeBi
• Observation of spin splitting in the surface electronic structure of antiferromagnet NdBi
• Long-range magnetic order induced surface state in GdBi and DyBi
• Universal Role of Combined Symmetry for the Protection of the Dirac Cone in Antiferromagnetic Topological Insulators
• Cubic Dirac Semimetals: General Theory and Application to Rare-Earth Magnets