Signatures of odd-frequency correlations in the Josephson current of superconductor/ferromagnet hybrid junctions

摘要: Contacting a bilayer ferromagnet with singlet even-frequency superconductor allows for the realization of an effective triplet odd-frequency superconductor. In this work, we investigate Josephson effect between superconductors different symmetries (e.g. odd- versus even-frequency). particular, study supercurrent flowing two superconducting leads through weak We show that peculiar temperature dependence critical current below transition is signature competition odd/odd-frequency and odd/even-frequency couplings.