Abstract
The superconductor ThIrSi, with Tc=6.5K, is expected to show unusual features in view of its noncentrosymmetric structure and the presence of heavy elements featuring a sizable spin-orbit coupling. Here, we report a comprehensive study of its electronic properties by means of magnetization, muon-spin rotation and relaxation (μSR) and nuclear magnetic resonance (NMR) measurements. Both the superfluid density ρsc(T) (determined via transverse-field μSR) and the spin-lattice relaxation rate T1-1(T) (determined via NMR) suggest a nodeless superconductivity. Furthermore, the absence of spontaneous magnetic fields below Tc, as evinced from zero-field μSR measurements, indicates a preserved time-reversal symmetry in the superconducting state of ThIrSi. Temperature-dependent upper critical fields as well as field-dependent superconducting muon-spin relaxations suggest the presence of multiple superconducting gaps in ThIrSi. Show more
Publication status
publishedExternal links
Journal / series
Physical Review BVolume
Pages / Article No.
Publisher
American Physical SocietyMore
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