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

doi:10.1103/PhysRevB.105.134523

Nodeless superconductivity in noncentrosymmetric LaRhSn

Superconductivity 2023-01-05 v1

Authors: 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

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Abstract

The 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.

Keywords

superconductivity thermal properties of materials high-temperature superconductivity

Cite

@article{arxiv.2301.01467,
  title  = {Nodeless superconductivity in noncentrosymmetric LaRhSn},
  author = {Z. Y. Nie and J. W. Shu and A. Wang and H. Su and W. Y. Duan and A. D. Hillier and D. T. Adroja and P. K. Biswas and T. Takabatake and M. Smidman and H. Q. Yuan},
  journal= {arXiv preprint arXiv:2301.01467},
  year   = {2023}
}

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9 pages, 8 figures

Nodeless superconductivity in noncentrosymmetric LaRhSn

Abstract

Keywords

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