Pairing of weakly correlated electrons in the platinum-based centrosymmetric superconductor SrPt3P

Abstract

We report a study of the normal- and superconducting-state electronic properties of the centrosymmetric compound SrPt3P via 31P nuclear-magnetic-resonance (NMR) and magnetometry investigations. Essential features such as a sharp drop of the Knight shift at T < Tc and an exponential decrease of the NMR spin-lattice relaxation ratio 1/(T1T) below Tc are consistent with an s-wave electron pairing in SrPt3P, although a direct confirmation in the form of a Hebel-Slichter-type peak is lacking. Normal-state NMR data at T < 50 K indicate conventional features of the conduction electrons, typical of simple metals such as lithium or silver. Our data are finally compared with available NMR results for the noncentrosymmetric superconductors LaPt${}_3$Si and CePt${}_3$Si, which adopt similar crystal structures.

arXiv comment7 pages, 8 figures

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Cited by in corpus (7)

• High pressure crystal growth of the antiperovskite centrosymmetric superconductor SrPt3P
• The effects of electron correlation and spin-orbit coupling in the isovalent Pd-doped superconductor SrPt${}_3$P
• Antiferromagnetic Kondo lattice compound CePt${}_3$P
• Room-temperature structural phase transition in the quasi-2D spin-1/2 Heisenberg antiferromagnet Cu(pz)${}_2$(ClO${}_4$)${}_2$
• Microscopic investigation of the weakly correlated noncentrosymmetric superconductor SrAuSi${}_3$
• Possible unconventional order parameter in single crystals of SrPt${}_3$P superconductor
• Andreev-reflection spectroscopy of SrPt3P single crystals