Half-Heusler compound LiMgBi exhibits pressure driven Topological Insulating (TI) nature with robust spin-locked dissipationless Fermion transport along the surface states.
AbstractWe theoretically report the finding of a new kind of topological phase transition between a normal insulator and a topological metal state where the closing-reopening of bandgap is accompanied by passing the Fermi level through an additional band. The resulting nontrivial topological metal phase is characterized by stable zero-energy localized edge states that exist within the full gapless bulk states. Such states living on a quasi-one-dimensional system with three sublattices per unit cell are protected by hidden inversion symmetry. While other required symmetries such as chiral, particle-hole, or full inversion symmetry are absent in the system.
Spin Polarization of Gapped Dirac Surface States Near the Topological Phase Transition inTlBi(S1−xSex)2
