Are Th doped Y2C3 and La2C3 two-band superconductors?

Details Are Th doped Y2C3 and La2C3 two-band superconductors? Are Th doped Y2C3 and La2C3 two-band superconductors?

2004-06-22

arxiv.org/abs/cond-mat/0406527v2

Physica B 359-361, 581 (2005)

Physics

Condensed Matter

Superconductivity

2+ pages. Proceedings of SCES'04. Final version. Added discussion on relevance to CePt3Si

Scientific paper

10.1016/j.physb.2005.01.147

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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