In this work we aim to analyze the effect of a strong antisymmetric spin-orbit coupling (ASOC) on superconductivity of noncentrosymmetric LaPtSi. We study the energy gap structure of polycrystalline LaPtSi by using magnetic penetration depth measurements down to 0.02Tc. We observed a dirty s-wave behavior, which provides compelling evidence that the spin-singlet component of the mixed pairing state is highly dominant. This is consistent with previous results in the sense that the mere presence of a strong ASOC does not lead to unconventional behaviors. Our result also downplays LaPtSi as a good candidate for realizing time-reversal invariant topological superconductivity.
@article{arxiv.1908.08828,
title = {Strong antisymmetric spin-orbit coupling and superconducting properties: The case of noncentrosymmetric LaPtSi},
author = {S. Palazzese and J. F. Landaeta and D. Subero and E. Bauer and I. Bonalde},
journal= {arXiv preprint arXiv:1908.08828},
year = {2019}
}