Physical properties of the noncentrosymmetric superconductor Mg_10Ir_19B_16

Details Physical properties of the noncentrosymmetric superconductor Mg_10Ir_19B_16 Physical properties of the noncentrosymmetric superconductor Mg_10Ir_19B_16

2007-06-14

arxiv.org/abs/0706.2177v2

Phys. Rev. Lett. 99, 257004 (2007)

Physics

Condensed Matter

Superconductivity

Text and figures revised. One author and point contact tunneling data added

Scientific paper

10.1103/PhysRevLett.99.257004

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 (Tc=4.45K, k(0)=20), with an electron-phonon coupling constant l_ep=0.66. An analysis of the T-dependent specific heat shows that superconducting properties are dominated by an s-wave gap (D=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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