Investigate the pairing symmetry of the noncentrosymmetric topological superconductor YCoC2 using muon.

Noncentrosymmetric superconductor (NCS) lacks inversion symmetry in the crystallographic structure, which leads to spin singlet-triplet mixing, may result in a nodal line in the gap symmetry, time-reversal symmetry (TRS) breaking. Recently, we have reported the presence of a nodal line gap symmetry of NCS ThCoC2 [PRL 122, 147001 (2019)]. Cigarroa et al. have reported superconductivity in the noncentrosymmetric Weyl semi metal YCoC2 with TC = 4.2 K. Interestingly the specific heat deviates from conventional exponential temperature dependence, suggests possible unconventional behaviour. The theoretical study suggests that in the absence of SOC, it can host two intersecting nodal rings protected by two mirror planes. This compound is very interesting to understand the topological superconductivity and Majorana zero modes. We, therefore, aim to investigate YCoC2 using musr measurements.