Andreev bound states and tunneling characteristics of a noncentrosymmetric superconductor

The tunneling characteristics of planar junctions between a normal metal and a noncentrosymmetric superconductor such as CePt3Si are examined. It is shown that the superconducting phase with mixed parity can give rise to characteristic zero-bias anomalies in certain junction directions. Andreev bound states at the interface are the origin of these zero-bias anomalies. The tunneling characteristics for different directions allow us to test the structure of the parity-mixed pairing state.