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DOE OSTI2020

Materials Data on DyBi by Materials Project

DyBi is Halite, Rock Salt structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Dy is bonded to six equivalent Bi atoms to form a mixture of edge and corner-sharing DyBi6 octahedra. The corner-sharing octahedral tilt angles are 0°. All Dy–Bi bond lengths are 3.17 Å. Bi is bonded to six equivalent Dy atoms to form a mixture of edge and corner-sharing BiDy6 octahedra. The corner-sharing octahedral tilt angles are 0°.

36 MATERIALS SCIENCE↗

DOE OSTI2024

Long-range magnetic order induced surface state in GdBi and DyBi

The recent discovery of unconventional surface-state pairs, which give rise to Fermi arcs and spin textures, in antiferromagnetically ordered rare-earth monopnictides attracted the interest in these materials. Here, we use angle-resolved photoemission spectroscopy measurements in conjunction with density functional theory calculations to investigate the evolution of the electronic structure of GdBi and DyBi. We find that new surface states, including a Dirac cone, emerge in the antiferromagnetic (AFM) state. However, they are located along a direction in momentum space that is different than what was found in NdSb, NdBi, and CeBi. The observed changes in the electronic structure are consistent with the presence of AFM-II-A type order.

36 MATERIALS SCIENCE↗