Type-I superconductivity in the noncentrosymmetric superconductor BeAu
Type-I superconductivity in the noncentrosymmetric superconductor BeAu
The noncentrosymmetric superconductor BeAu has been investigated using magnetization, resistivity, specific heat, and muon-spin relaxation/rotation. BeAu crystallizes in a cubic FeSi-type B20 structure with a superconducting transition temperature ${T}_{c}=3.2\ifmmode\pm\else\textpm\fi{}0.1\phantom{\rule{0.28em}{0ex}}\mathrm{K}$. The low-temperature specific heat data, ${C}_{\mathrm{el}}$(T), indicates a weakly-coupled fully gapped BCS superconductivity with an isotropic energy gap $2\mathrm{\ensuremath{\Delta}}(0)/{k}_{B}{T}_{c}=3.76$, close to …