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Realization of semimetals with non-trivial topologies such as Dirac and Weylsemimetals, have provided a boost in the study of these quantum materials.Presence of electron correlation makes the system even more exotic due toenhanced scattering of charge carriers, Kondo screening etc. Here, we studiedthe electronic properties of single crystalline, SmBi employing varied state ofthe art bulk measurements. Magnetization data reveals two magnetic transitions;an antiferromagnetic order with a Neel temperature of ~ 9 K and a secondmagnetic transition at a lower temperature (= 7 K). The electrical resistivitydata shows an upturn typical of a Kondo system and the estimated Kondotemperature is found to be close to the Neel temperature. High quality of thecrystal enabled us to discover signature of quantum oscillation in themagnetization data even at low magnetic field. Using a Landau level fan diagramanalysis, a non-trivial Berry phase is identified for a Fermi pocket revealingthe topological character in this material. These results demonstrate an uniqueexample of the Fermiology in the antiferromagnetic state and opens up a newparadigm to explore the Dirac fermion physics in correlated topological metalvia interplay of Kondo interaction, topological order and magnetism.

Evidence of non-trivial Berry phase and Kondo physics in SmBi