μSR Study of Superconductor Re2Hf and Re2Zr

Noncentrosymmetric superconductors are expected to exhibit a highly unconventional ground-state, which consists of an admixture of spin-singlet and spin-triplet Cooper pairs. Nevertheless, this highly unconventional superconducting behaviour has yet to be conclusively verified in any material to this date. Recently, Re6X series compounds reported to shows time reversal breaking but coupling mechanism is not clear. To understand the role of crystal structure, In this proposal, we are proposing to investigate, Re2Zr and Re2Hf, where initial muon data suggest some unconventional ground state.