The nonsymmorphic Zr2Ir alloy is a possible topological semimetal candidate material and as such may be part of an exotic class of superconductors. Zr2Ir is a superconductor with a transition temperature of 7.4 K with critical fields of 19.6(3) mT and 3.79(3) T, as determined by heat capacity and magnetisation. Zero field muon spin relaxation measurements show that time-reversal symmetry is preserved in these materials. The specific heat and transverse field muon spin rotation measurements rule out any possibility to have a nodal or anisotropic superconducting gap, revealing a conventional s-wave nature in the superconducting ground state. Therefore, this system is found to be conventional nonsymmorphic superconductor, with time-reversal symmetry being preserved and an isotropic superconducting gap.
@article{arxiv.2106.00268,
title = {Superconducting ground state of nonsymmorphic superconducting compound Zr$_{2}$Ir},
author = {Manasi Mandal and Chandan Patra and Anshu Kataria and D. Singh and P. K. Biswas and J. S. Lord and A. D. Hillier and R. P. Singh},
journal= {arXiv preprint arXiv:2106.00268},
year = {2021}
}