SrPt3P: A two-band single-gap superconductor
R. Khasanov, A. Amato, P. K. Biswas, H. Luetkens, N. D. Zhigadlo, B. Batlogg
DOI 10.1103/PhysRevB.90.140507 · Physical Review B
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Abstract
The magnetic penetration depth (λ) as a function of applied magnetic field and temperature in SrPt3P (Tc≃8.4 K) was studied by means of muon-spin rotation (μSR). The dependence of λ−2 on temperature suggests the existence of a single s-wave energy gap with the zero-temperature value Δ0=1.55(2) meV. At the same time λ was found to be strongly field dependent which is the characteristic feature of the nodal gap and/or multiband systems. The multiband nature of the superconducting state is further suggested by the upward curvature of the upper critical field. This apparent contradiction is resolved by SrPt3P being a particular two-band superconductor with equal gaps but different coherence lengths within the two Fermi surface sheets.
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 | onset |
| SrPt3P Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 8.4 | Pressure not reported | onset |
| CaPt3P Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 6.6 | Pressure not reported | unknown |
| 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 |
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