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arXiv · 2302.03365

Temperature dependence of the lower critical field of the noncentrosymmetric superconductor $\alpha$-BiPd

J. Juraszek·M. Konczykowski·D. Kaczorowski·T. Cichorek
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Abstract

Temperature variation of the lower critical field in the noncentrosymmetric superconductor $\alpha$-BiPd was probed by local magnetization measurements using Hall micromagnetometry, performed down to 0.3 K in a magnetic field applied along the crystallographic $b$ axis. Below a critical temperature $T_c \simeq$ 3.8 K, a conventional $H_{c1}(T)$ dependence was found, typical for a single-band $s$-wave BCS superconductor. The obtained data imply an absence of spin-triplet component in the superconducting wavefunction and marginal multiband effects in this material, which contradicts some literature reports.

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J. Juraszek, M. Konczykowski, D. Kaczorowski, T. Cichorek. 2023-02-07. Temperature dependence of the lower critical field of the noncentrosymmetric superconductor $\alpha$-BiPd. https://doi.org/10.1002/pssr.202200423

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