Abstract
In noncentrosymmetric metals, the spin degeneracy of the electronic bands is lifted by spin-orbit coupling. We consider general symmetry properties of the pairing function in noncentrosymmetric superconductors with spin-orbit coupling (NSC), including , UIr, and . We find that , where is an even function which transforms according to the irreducible representations of the crystallographic point group and is a model-dependent phase factor. We consider tunneling between a NSC and a conventional superconductor. It is found that, in terms of thermodynamical properties as well as the Josephson effect, the state of NSC resembles a singlet superconducting state with gap function .
- Received 8 June 2004
DOI:https://doi.org/10.1103/PhysRevB.70.214510
©2004 American Physical Society