Josephson Current in the Presence of a Precessing Spin

Details Josephson Current in the Presence of a Precessing Spin Josephson Current in the Presence of a Precessing Spin

2002-06-26

arxiv.org/abs/cond-mat/0206526v1

Physics

Condensed Matter

Superconductivity

5 pages, 1 figure

Scientific paper

10.1103/PhysRevB.67.174505

The Josephson current in the presence of a precessing spin between various types of superconductors is studied. It is shown that the Josephson current flowing between two spin-singlet pairing superconductors is not modulated by the precession of the spin. When both superconductors have equal-spin-triplet pairing state, the flowing Josephson current is modulated with twice of the Larmor frequency by the precessing spin. It was also found that up to the second tunneling matrix elements, no Josephson current can occur with only a direct exchange interaction between the localized spin and the conduction electrons, if the two superconductors have different spin-parity pairing states.

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