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arXiv · 1908.08828

Strong antisymmetric spin-orbit coupling and superconducting properties: The case of noncentrosymmetric LaPtSi

S. Palazzese·J. F. Landaeta·D. Subero·E. Bauer·I. Bonalde
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Abstract

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 0.02$T_c$. 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.

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S. Palazzese, J. F. Landaeta, D. Subero, E. Bauer, I. Bonalde. 2019-08-23. Strong antisymmetric spin-orbit coupling and superconducting properties: The case of noncentrosymmetric LaPtSi. https://doi.org/10.1088/1361-648x/aac61d

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