Fractional flux quanta at intrinsic metallic interfaces of noncentrosymmetric superconductors

摘要

We examine intrinsic interfaces separating crystalline twin domains of opposite spin-orbit Coupling ill a noncentrosymmetric Superconductor such. CCPt3Si. At these interfaces, low-energy Andreev bound states occur as a consequence of parity-mixed Coopcr pairing, and a Superconducting phase which violates time reversal symmetry call be realized. This provides all environment allowing flux lines with fractional flux quanta to be formed at the interface. Their presence could have strong implications oil the flux creep behavior in Such Superconductors.