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Using density functional theory based methods we report the structural,electronic and topological properties of the FCC crystal compound TmBi. Thismaterial is found to be dynamically stable and shows a non magnetic semimetaliccharacter. By tuning the spin-orbit coupling, we observe a significant changein the band structure, and the occurrence of band inversion along $\Gamma -X$direction. The parity product at time-reversal invariant momentum points andthe Wannier charge center calculations provide a topological index $Z_{2}=1$ onthe $k_{j}=0$ plane (with $j=1,2$ and $3$) revealing the non trivialtopological character of TmBi. The existence of topologically protected surfacestates of TmBi through the observation of a Dirac cones at $\bar{X}$ pointconfirm our finding. The present work could inspire platforms for exploringnovel topological states within the family of rare-earth monobismuthides.

Structural, electronic and topological properties of 3D TmBi compound