Synthesis, structure, chemical doping and high pressure studies of the SrPt$_{3}$ P with unique structure features

Superconductivity up to 8.4K was reported by Takayama et al.\footnote{T. Takayama, K. Kuwano, D. Hirai, Y. Katsura, A. Yamamoto, and H. Takagi, Phys. Rev. Lett., 108, 237001(2012).} in APt$_{3}$P (A$=$Sr, Ca and La) in 2012 with structural information based only on X-ray powder refinement. The compounds are suggested to crystallize in an antiperovskite-based structure closely related to that of the heavy fermion superconductor CePt$_{3}$Si but are nonpolar unlike CePt$_{3}$Si. Both small single crystals and polycrystalline samples of SrPt$_{3}$P, the compound with the highest T$_{c}$ of this class of materials, are synthesized through solid state reactions. In this presentation, full and detailed structural information will be revealed based on X-ray single crystal analysis. Different chemical doping on different sites and high pressure studies have been carried out on the compound of SrPt$_{3}$P. The results and its implication will be presented and discussed.