Superconductivity in Hourglass Dirac Chain Metals (Ti, Hf)IrGe.

ABSTRACT: Realizing superconductivity in stoichiometric topological materials is a major focus in condensed matter physics, as it paves the way to achieve topological superconductivity. Here, it is reported that the discovery of ternary germanide superconductors, MIrGe (M = Ti, Hf), predicted to exhibit non-symmorphic symmetry-protected hourglass Dirac chains, can be prime candidates for topological superconductivity. Using comprehensive thermodynamic and muon-spin rotation/relaxation (µSR) measurements, these materials are established as conventional bulk type-II superconductors with transition temperatures of 2.24(5) K for TiIrGe and 5.64(4) K for HfIrGe, featuring a full gap and preserved time-reversal symmetry. First-principles calculations reveal striking topological features in MIrGe, includin

SUBMITTER: Meena PK 

PROVIDER: S-EPMC12631931 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature