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08 February 2025
 
  » arxiv » 2301.01467

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Nodeless superconductivity in noncentrosymmetric LaRhSn
Z. Y. Nie ; J. W. Shu ; A. Wang ; H. Su ; W. Y. Duan ; A. D. Hillier ; D. T. Adroja ; P. K. Biswas ; T. Takabatake ; M. Smidman ; H. Q. Yuan ;
Date 4 Jan 2023
AbstractThe superconducting order parameter of the noncentrosymmetric superconductor LaRhSn is investigated by means of low temperature measurements of the specific heat, muon-spin relaxation/rotation ($mu$SR) and the tunnel-diode oscillator (TDO) based method. The specific heat and magnetic penetration depth [$lambda(T)$] show an exponentially activated temperature dependence, demonstrating fully gapped superconductivity in LaRhSn. The temperature dependence of $lambda^{-2}(T)$ deduced from the TDO based method and $mu$SR show nearly identical behavior, which can be well described by a single-gap $s$-wave model, with a zero temperature gap value of $Delta(0)=1.77(4)k_BT_c$. The zero-field $mu$SR spectra do not show detectable changes upon cooling below $T_c$, and therefore there is no evidence for time-reversal-symmetry breaking in the superconducting state.
Source arXiv, 2301.01467
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