Josephson current through a precessing spin
Paper i proceeding, 2009
A study of the dc Josephson current between two superconducting leads in the presence of a precessing classical spin is presented. The precession gives rise to a time-dependent tunnel potential which not only creates diﬀerent tunneling probabilities for spin-up and spin- down quasiparticles, but also introduces a time-dependent spin-ﬂip term. In particular, we
study the eﬀects of the spin-ﬂip term alone on the Josephson current between two spin-singlet
superconductors as a function of precession frequency and junction transparency. The system
displays a steady-state solution although the magnitude and nature of the current is indeed
aﬀected by the precession frequency of the classical spin.