Abstract

We demonstrate an extremely high upper-critical-field, Bc2, in the noncentrosymmetric heavy-fermion superconductor CeRhSi3 for a magnetic field along the tetragonal c-axis. The robustness of the superconductivity over the magnetic field is outstanding among the known superconductors. The extremely large Bc2 is attributed to the absence of the paramagnetic pair-breaking effect characteristic of noncentrosymmetric superconductors.

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