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Nodeless superconductivity in Ir_(1-x)Pt_xTe₂ with strong spin-orbital coupling

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arxiv 1209.4229 v3 pith:FLJ6BRMQ submitted 2012-09-19 cond-mat.supr-con cond-mat.str-el

Nodeless superconductivity in Ir_(1-x)Pt_xTe₂ with strong spin-orbital coupling

classification cond-mat.supr-con cond-mat.str-el
keywords couplingfieldkappaspin-orbitalstrongmagneticnodelessconductivity
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The thermal conductivity $\kappa$ of superconductor Ir$_{1-x}$Pt$_{x}$Te$_2$ ($x$ = 0.05) single crystal with strong spin-orbital coupling was measured down to 50 mK. The residual linear term $\kappa_0/T$ is negligible in zero magnetic field. In low magnetic field, $\kappa_0/T$ shows a slow field dependence. These results demonstrate that the superconducting gap of Ir$_{1-x}$Pt$_{x}$Te$_2$ is nodeless, and the pairing symmetry is likely conventional s-wave, despite the existence of strong spin-orbital coupling and a quantum critical point.

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