Multigap nodeless superconductivity in the Dirac intermetallic alloy V2Ga5 with one-dimensional vanadium chains

A vast landscape of topological phases of matter with emergent quasiparticles has been explored in the past two decades, but the majority of them are 2D or 3D in essence and far fewer 1D counterparts are known to exist. Here, first-principles calculations reveal a multitude of topological fermions near the Fermi level in the quasi-one-dimensional alloy V${}_{2}$Ga${}_{5}$, which becomes a multigap nodeless superconductor below 3.6 K, raising the possibility of realizing topological superconductivity in this quasi-1D system.