Muon spin rotation study of the ternary noncentrosymmetric superconductors Li$_2$Pd$_x$Pt$_{3-x}$B

We investigated the superconducting state of the noncentrosymmetric superconductors Li $_{2}$ Pd $_{x}$ Pt $_{3 - x}$ B with superconducting transition temperature $T_{c}$ = 5.16(8) K ( $x$ =2.25), 3.56(8) K ( $x = 1.5$ ) and 2.60 K ( $x = 0$ ) by means of muon-spin rotation ( $μ$ SR) and specific heat experiments. The $μ$ SR relaxation rate $σ_{s c}$ was found to be constant at low temperatures for all the compounds. Data taken at different magnetic fields show that the magnetic penetration depth $λ$ is field-independent for Li $_{2}$ Pd $_{2.25}$ Pt $_{0.75}$ B and Li $_{2}$ Pt $_{3}$ B. The electronic contribution to the specific heat measured in Li $_{2}$ Pd $_{1.5}$ Pt $_{1.5}$ B and Li $_{2}$ Pt $_{3}$ B increases exponentially at the lowest temperatures. These features suggest that the {\it whole family} of Li $_{2}$ Pd $_{x}$ Pt $_{3 - x}$ B are single-gap s-wave superconductors across the entire doping regime.

Muon spin rotation study of the ternary noncentrosymmetric superconductors Li $_{2}$ Pd $_{x}$ Pt $_{3 - x}$ B

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Muon spin rotation study of the ternary noncentrosymmetric superconductors Li $_{2}$ Pd $_{x}$ Pt $_{3 - x}$ B

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Muon spin rotation study of the ternary noncentrosymmetric superconductors Li22​Pdxx​Pt3−x3−x​B

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Muon spin rotation study of the ternary noncentrosymmetric superconductors Li22​Pdxx​Pt3−x3−x​B

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Muon spin rotation study of the ternary noncentrosymmetric superconductors Li $_{2}$ Pd $_{x}$ Pt $_{3 - x}$ B

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Muon spin rotation study of the ternary noncentrosymmetric superconductors Li $_{2}$ Pd $_{x}$ Pt $_{3 - x}$ B

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