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• W3204633044 abstract "We studied the behavior of nontrivial Dirac fermion states in an antiferromagnetic metal SmBi using angle-resolved photoemission spectroscopy (ARPES). The experimental results exhibit multiple Fermi pockets around $overline{Gamma}$ and $overline{M}$ points along with a band inversion in the spectrum along the $overline{Gamma}$-$overline{M}$ line consistent with the density functional theory results. In addition, ARPES data reveal Dirac cones at $overline{Gamma}$ and $overline{M}$ points within the energy gap of the bulk bands. The Dirac cone at $overline{M}$ exhibit a distinct Dirac point and is intense in the high photon energy data while the Dirac cone at $overline{Gamma}$ is intense at low photon energies. Employing ultra-high-resolution ARPES, we discover destruction of a Fermi surface constituted by the surface states across the Ne'{e}l temperature of 9 K. Interestingly, the Dirac cone at $overline{Gamma}$ is found to be gapped at 15 K and the behavior remains similar across the magnetic transition. These results reveal complex momentum dependent gap formation and fermi surface destruction across magnetic transition in an exotic correlated topological material; the interplay between magnetism and topology in this system calls for ideas beyond existing theoretical models." @default.
• W3204633044 created "2021-10-11" @default.
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• W3204633044 date "2022-08-23" @default.
• W3204633044 modified "2023-10-16" @default.
• W3204633044 title "Behavior of gapped and ungapped Dirac cones in the antiferromagnetic topological metal SmBi" @default.
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• W3204633044 doi "https://doi.org/10.1103/physrevb.106.085132" @default.
• W3204633044 hasPublicationYear "2022" @default.
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