Evidence for unconventional superconductivity in the nonoxide perovskite MgCNi3 from penetration depth measurements

R. Prozorov, A. Snezhko, T. He, J. Cava

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The London penetration depth λ(T) was measured in polycrystalline powders of the nonoxide perovskite superconductor MgCNi3 by using a sensitive tunnel-diode resonator technique. The penetration depth exhibits distinctly non s-wave BCS low-temperature behavior, instead showing quadratic temperature dependence, suggestive of a nodal order parameter.

Original languageEnglish (US)
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number18
StatePublished - Nov 13 2003

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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