Andreev bound states and tunneling characteristics of a noncentrosymmetric superconductor

Iniotakis, C.*; Hayashi, Nobuhiko; Sawa, Yasuo*; Yokoyama, Takehito*; May, U.*; Tanaka, Yukio*; Sigrist, M.*

Physical Review B, 76(1), p.012501_1 - 012501_4, 2007/07

https://doi.org/10.1103/PhysRevB.76.012501

The tunneling characteristics of planar junctions between a normal metal and a noncentrosymmetric superconductor such as CePtSi 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.