Time-Reversal Symmetry Breaking in the Centrosymmetric Nonsymmorphic Superconductor RuB2
Centrosymmetric nonsymmorphic AB2 (A = Ru, Os) borides exhibit anomalous superconducting properties, but the microscopic nature of their superconducting ground state remains unresolved. Here, we investigate RuB2 using zero- and transverse-field muon spin relaxation (muSR), first-principles electronic-structure calculat...