Origin of the exotic electronic states in antiferromagnetic NdSb

Abstract

Using angle resolved photoemission spectroscopy measurements and first principle calculations, we report that the possible unconventional 2q antiferromagnetic (AFM) order in NdSb can induce unusual modulation on its electronic structure. The obvious extra bands observed in the AFM phase of NdSb are well reproduced by theoretical calculations, in which the Fermi-arc-like structures and sharp extra bands are originated from the in-gap surface states. However, they are demonstrated to be topological trivial. By tuning the chemical potential, the AFM phase of NdSb would go through a topological phase transition, realizing a magnetic topological insulator phase. Hence, our study sheds new light on the rare earth monopnictides for searching unusual AFM structure and the potential of intrinsic magnetic topological materials.

13 pages, 4 figures

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Cited by in corpus (5)

• Antiferromagnetic topological insulator with selectively gapped Dirac cones
• Unusual surface states associated with the PT-symmetry breaking and antiferromagnetic band folding in NdSb
• Observation of spin splitting in the surface electronic structure of antiferromagnet NdBi
• Unexpected changes in the band structure within AFM1 state of CeBi
• Unconventional band splitting of CeSb in the devil's staircase transition