Josephson Current between Triplet and Singlet Superconductors
Abstract
The Josephson effect between triplet and singlet superconductors is studied. Josephson current can flow between triplet and singlet superconductors due to the spin-orbit coupling in the spin-triplet superconductor but it is finite only when triplet superconductor has Lz=-Sz= 1, where Lz and Sz are the perpendicular components of orbital angular momentum and spin angular momentum of the triplet Cooper pairs, respectively. The recently observed temperature and orientational dependence of the critical current through a Josephson junction between UPt3 and Nb is investigated by considering a non-unitary triplet state.
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