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

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

Physics

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

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 (μSR), and the tunnel-diode oscillator (TDO)-based method. The specific heat and magnetic penetration depth [λ(T)] show an exponentially activated temperature dependence, demonstrating fully gapped superconductivity in LaRhSn. The temperature dependences of λ-2(T) deduced from the TDO-based method and μSR show nearly identical behavior, which can be well described by a single-gap s-wave model, with a zero-temperature gap value of Δ(0)=1.77(4)kBTc. The zero-field μSR spectra do not show detectable changes upon cooling below Tc, and therefore there is no evidence for time-reversal-symmetry breaking in the superconducting state.

Original language	English
Article number	134523
Journal	Physical Review B
Volume	105
Issue number	13
DOIs	https://doi.org/10.1103/PhysRevB.105.134523
Publication status	Published - 1 Apr 2022

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.105.134523

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title = "Nodeless superconductivity in noncentrosymmetric LaRhSn",

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 (μSR), and the tunnel-diode oscillator (TDO)-based method. The specific heat and magnetic penetration depth [λ(T)] show an exponentially activated temperature dependence, demonstrating fully gapped superconductivity in LaRhSn. The temperature dependences of λ-2(T) deduced from the TDO-based method and μSR show nearly identical behavior, which can be well described by a single-gap s-wave model, with a zero-temperature gap value of Δ(0)=1.77(4)kBTc. The zero-field μSR spectra do not show detectable changes upon cooling below Tc, and therefore there is no evidence for time-reversal-symmetry breaking in the superconducting state.",

author = "Nie, {Z. Y.} and Shu, {J. W.} and A. Wang and H. Su and Duan, {W. Y.} and Hillier, {A. D.} and Adroja, {D. T.} and Biswas, {P. K.} and T. Takabatake and M. Smidman and Yuan, {H. Q.}",

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doi = "10.1103/PhysRevB.105.134523",

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T1 - Nodeless superconductivity in noncentrosymmetric LaRhSn

AU - Nie, Z. Y.

AU - Shu, J. W.

AU - Wang, A.

AU - Su, H.

AU - Duan, W. Y.

AU - Hillier, A. D.

AU - Adroja, D. T.

AU - Biswas, P. K.

AU - Takabatake, T.

AU - Smidman, M.

AU - Yuan, H. Q.

PY - 2022/4/1

Y1 - 2022/4/1

N2 - 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 (μSR), and the tunnel-diode oscillator (TDO)-based method. The specific heat and magnetic penetration depth [λ(T)] show an exponentially activated temperature dependence, demonstrating fully gapped superconductivity in LaRhSn. The temperature dependences of λ-2(T) deduced from the TDO-based method and μSR show nearly identical behavior, which can be well described by a single-gap s-wave model, with a zero-temperature gap value of Δ(0)=1.77(4)kBTc. The zero-field μSR spectra do not show detectable changes upon cooling below Tc, and therefore there is no evidence for time-reversal-symmetry breaking in the superconducting state.

AB - 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 (μSR), and the tunnel-diode oscillator (TDO)-based method. The specific heat and magnetic penetration depth [λ(T)] show an exponentially activated temperature dependence, demonstrating fully gapped superconductivity in LaRhSn. The temperature dependences of λ-2(T) deduced from the TDO-based method and μSR show nearly identical behavior, which can be well described by a single-gap s-wave model, with a zero-temperature gap value of Δ(0)=1.77(4)kBTc. The zero-field μSR spectra do not show detectable changes upon cooling below Tc, and therefore there is no evidence for time-reversal-symmetry breaking in the superconducting state.

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Nodeless superconductivity in noncentrosymmetric LaRhSn

Abstract

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