Enhancing triplet superconductivity by the proximity to a singlet superconductor in oxide heterostructures

Abstract

We show how in principle a coherent coupling between two superconductors of opposite parity can be realized in a three-layer oxide heterostructure. Due to strong intraionic spin-orbit coupling in the middle layer, singlet Cooper pairs are converted into triplet ones and vice versa. This results in a large enhancement of the triplet superconductivity, persisting well above the native triplet critical temperature.

Minor improvements, references added, published version. 5 pages, 3 figures