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

In this work we aim to analyze the effect of a strong antisymmetric spin-orbit coupling (ASOC) on the 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-wav...

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Bibliographic Details
Published in:Journal of physics. Condensed matter 2018-06, Vol.30 (25), p.255603-255603
Main Authors: Palazzese, S, Landaeta, J F, Subero, D, Bauer, E, Bonalde, I
Format: Article
Language:English
Subjects:
noncentrosymmetric
spin-orbit coupling
superconductivity
topological
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Summary:In this work we aim to analyze the effect of a strong antisymmetric spin-orbit coupling (ASOC) on the 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.
ISSN:0953-8984
1361-648X
DOI:10.1088/1361-648X/aac61d