4.8 Article

Physical properties of the noncentrosymmetric superconductor Mg10Ir19B16

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PHYSICAL REVIEW LETTERS
卷 99, 期 25, 页码 -

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AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.99.257004

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Specific heat, electrical resistivity, and magnetic susceptibility measurements on a high quality sample of Mg10Ir19B16 provide a self-consistent determination of its superconducting properties. They indicate that Mg10Ir19B16 is a type-II superconductor [T-C=4.45 K, kappa(0)approximate to 20], with an electron-phonon coupling constant lambda(ep)=0.66. An analysis of the T-dependent specific heat shows that superconducting properties are dominated by an s-wave gap (Delta=0.7 meV). Point contact tunneling data provide evidence for multiple superconducting gaps, as expected from strong asymmetric spin-orbit coupling.

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