Muon-spin rotation study of the ternary noncentrosymmetric superconductors Li&lt;sub&gt;2&lt;/sub&gt;Pd&lt;em&gt;&lt;sub&gt;x&lt;/sub&gt;&lt;/em&gt;Pt&lt;sub&gt;3-&lt;em&gt;x&lt;/em&gt;&lt;/sub&gt;B

Häfliger, P.S.; Khasanov, R.; Lortz, R.; Petrović, A.; Togano, K.; Baines, C.; Graneli, B.; Keller, H.

doi:10.1007/s10948-008-0440-y

Muon-spin rotation study of the ternary noncentrosymmetric superconductors Li₂Pd_xPt_3-xB

Häfliger PS, Khasanov R, Lortz R, Petrović A, Togano K, Baines C, Graneli B & Keller H

Citation

Häfliger, P. S., Khasanov, R., Lortz, R., Petrović, A., Togano, K., Baines, C., … Keller, H. (2009). Muon-spin rotation study of the ternary noncentrosymmetric superconductors Li₂Pd_xPt_3-xB. Journal of Superconductivity and Novel Magnetism, 22(4), 337-342. https://doi.org/10.1007/s10948-008-0440-y

Persistent URL https://www.dora.lib4ri.ch/psi/islandora/object/psi:17344

We investigated the superconducting state of the noncentrosymmetric superconductors Li₂Pd_xPt_3−xB 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 (μSR) and specific heat experiments. The μSR relaxation rate σ_sc 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 Li₂Pd_2.25Pt_0.75B and Li₂Pt₃B. The electronic contribution to the specific heat measured in Li₂Pd_1.5Pt_1.5B and Li₂Pt₃B increases exponentially at the lowest temperatures. These features suggest that the whole family of Li₂Pd_xPt_3−xB comprises single-gap s-wave superconductors across the entire doping regime.