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

T. Shiroka; M. Pikulski; N. D. Zhigadlo; B. Batlogg; J. Mesot; H.-R. Ott

doi:10.1103/PhysRevB.91.245143

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

T. Shiroka, M. Pikulski, N. D. Zhigadlo, B. Batlogg, J. Mesot, H.-R. Ott

DOI 10.1103/PhysRevB.91.245143 · Physical Review B

T1

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Abstract

We report a study of the normal- and superconducting-state electronic properties of the centrosymmetric compound SrPt3P via P31 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 LaPt3Si and CePt3Si, which adopt similar crystal structures.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
SrPt3P Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	8.4	Pressure not reported	unknown
SrPt3P Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	8.5	Pressure not reported	onset
LaPt3P Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	1.5	Pressure not reported	unknown
LaPt3Si Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
CePt3Si Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown