Supercurrent reversal in Zeeman-split Josephson junctions
Supercurrent reversal in Zeeman-split Josephson junctions
We theoretically study the current-phase relation in a Josephson junction comprising the Zeeman-split superconductors (ZSs) and a normal metal (N). We show that at low temperatures the Josephson current in the ZS/N/ZS junctions exhibits a supercurrent reversal at a certain phase difference ${\ensuremath{\varphi}}_{c}\ensuremath{\in}(0,\ensuremath{\pi})$. By calculating the spectral Josephson current, we …