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Probing the superconducting ground state of the noncentrosymmetric superconductors CaTSi3 (T = Ir, Pt) using muon-spin relaxation and rotation

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arxiv 1405.2313 v2 pith:NKBHHOEG submitted 2014-05-09 cond-mat.supr-con

Probing the superconducting ground state of the noncentrosymmetric superconductors CaTSi3 (T = Ir, Pt) using muon-spin relaxation and rotation

R. P. Singh , A. D. Hillier , D. Chowdhury , J. A. T. Barker , D. McK. Paul , M. R. Lees , G. Balakrishnan This is my paper
classification cond-mat.supr-con
keywords muon-spinrotationsuperconductingbeencairsi3captsi3catsi3determined
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The superconducting properties of CaTSi3 (where T = Pt and Ir) have been investigated using muon spectroscopy. Our muon-spin relaxation results suggest that in both these superconductors time-reversal symmetry is preserved, while muon-spin rotation data show that the temperature dependence of the superfluid density is consistent with an isotropic s-wave gap. The magnetic penetration depths and upper critical fields determined from our transverse-field muon-spin rotation spectra are found to be 448(6) and 170(6) nm, and 3800(500) and 1700(300) G, for CaPtSi3 and CaIrSi3 respectively. The superconducting coherence lengths of the two materials have also been determined and are 29(2) nm for CaPtSi3 and 44(4) nm for CaIrSi3.

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