Abstract:
In this article, we report emergence of topological phase in extremely large magnetoresistance
(XMR) material TmSb under hydrostatic pressure using first principles calculations. We find
that TmSb, a topologically trivial semimetal, undergoes a topological phase transition with
band inversion at X point without breaking any symmetry under a hydrostatic pressure of 12
GPa. At 15 GPa, it again becomes topologically trivial with band inversion at Γ as well as X
point. We find that the pressures corresponding to the topological phase transitions are far
below the pressure corresponding to structural phase transition at 25.5 GPa. The reentrant
behaviour of topological quantum phase with hydrostatic pressure would help in finding a
correlation between topology and XMR effects through experiments.
