Current Rectification in Junctions with Spin-Split Superconductors

Spin-split superconductors exhibit an electron-hole asymmetric spin-resolved density of states, but the symmetry is restored upon averaging over spin. On other hand, asymmetry appears again in tunneling junctions spin-split with a spin-polarized barrier. As demonstrated recently both theory and experiment, this fact leads to particularly strong thermoelectric effect superconductor-ferromagnet structures. In work we show another important stemming from asymmetry: current rectification. We calculate charge tunnel normal metal superconductor ac dc voltage bias. case, I-V curve not fully antisymmetric has voltage-symmetric component due spin polarization. This translates existence rectified which proportional polarization junction strongly depends on frequency applied discuss possible applications rectification effect, including diode for superconducting electronics radiation detectors. The analysis supplemented by discussion heat relevant noise correlators, where also plays role, are useful