Temperature Dependence of the Lower Critical Field of the Noncentrosymmetric Superconductor α ‐BiPd

Jarosław Juraszek (1) , Marcin Konczykowski (2, 3) , Dariusz Kaczorowski (1) , Tomasz Cichorek (1)

1 Institute of Low Temperature and Structure Research [Polish Academy of Sciences]
2 LSI - Laboratoire des Solides Irradiés - Irradiated Solids Laboratory
3 NNE - LSI - Nouveaux États Électroniques

Temperature variation of the lower critical H c1 field in the noncentrosymmetric superconductor α-BiPd is 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 ≃ 3.8 K, a conventional H c1 ðTÞ dependence is found, typical for a single-band s-wave 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.

Domaines: Supraconductivité [cond-mat.supr-con]

Jarosław Juraszek, Marcin Konczykowski, Dariusz Kaczorowski, Tomasz Cichorek. Temperature Dependence of the Lower Critical Field of the Noncentrosymmetric Superconductor α ‐BiPd. physica status solidi (RRL) - Rapid Research Letters, 2022, 17 (3), pp.2200423. ⟨10.1002/pssr.202200423⟩. ⟨hal-04034869⟩