Superconductivity in 122-Type Pnictides without Iron
نویسنده
چکیده
The exploration of superconducting iron-free pnictides with a ThCr2Si2-type or related structure and the study of their superconducting properties are important in order to get a deeper understanding of the pairing mechanism of 122 iron pnictides. Here we review the properties of 122-type iron-free pnictides superconductors with structures similar to that of BaFe2As2. Evidence of fully gapped nature of superconducting state has come from the specific heat and thermal conductivity measurements for BaNi2As2 and SrNi2P2, and nuclear magnetic and quadrupole resonance measurements for CaPd2As2 etc. Combined with the fact that no magnetism is observed in 122-type iron-free pnictides superconductors, the majority of evidence suggests that most of these compounds are conventional electron–phonon-mediated superconductors.
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