1. SrPt3P: A two-band single-gap superconductor.
- Author
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Khasanov, R., Amato, A., Biswas, R. K., Luetkens, H., Zhigadlo, N. D., and Batlogg, B.
- Subjects
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SUPERCONDUCTORS , *MAGNETIC fields , *MUON spin rotation , *FERMI surfaces , *SUPERCONDUCTING transitions - 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 Δo = 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. [ABSTRACT FROM AUTHOR]
- Published
- 2014
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