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Are Th doped Y2C3 and La2C3 two-band superconductors?

I. A. Sergienko

cond-mat.supr-conarXiv:cond-mat/0406527

Abstract

The superconducting sesquicarbides R2C3 have noncentrosymmetric point group symmetry Td. Spin-orbit coupling lifts the spin degeneracy of electronic bands in the most of the Brillouin zone. Nevertheless, due to high symmetry, there are a few directions along which the Fermi surfaces must touch. This leads to the two-band effects in the superconducting state.

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